Allantois
Yolk Sac
The first of four extra-embryonic membranes to form during EMBRYOGENESIS. In REPTILES and BIRDS, it arises from endoderm and mesoderm to incorporate the EGG YOLK into the DIGESTIVE TRACT for nourishing the embryo. In placental MAMMALS, its nutritional function is vestigial; however, it is the source of INTESTINAL MUCOSA; BLOOD CELLS; and GERM CELLS. It is sometimes called the vitelline sac, which should not be confused with the VITELLINE MEMBRANE of the egg.
Extraembryonic Membranes
The thin layers of tissue that surround the developing embryo. There are four extra-embryonic membranes commonly found in VERTEBRATES, such as REPTILES; BIRDS; and MAMMALS. They are the YOLK SAC, the ALLANTOIS, the AMNION, and the CHORION. These membranes provide protection and means to transport nutrients and wastes.
Chorion
Primitive Streak
Mesoderm
Blood Vessels
Embryo, Mammalian
Placenta
A highly vascularized mammalian fetal-maternal organ and major site of transport of oxygen, nutrients, and fetal waste products. It includes a fetal portion (CHORIONIC VILLI) derived from TROPHOBLASTS and a maternal portion (DECIDUA) derived from the uterine ENDOMETRIUM. The placenta produces an array of steroid, protein and peptide hormones (PLACENTAL HORMONES).
T-Box Domain Proteins
Proteins containing a region of conserved sequence, about 200 amino acids long, which encodes a particular sequence specific DNA binding domain (the T-box domain). These proteins are transcription factors that control developmental pathways. The prototype of this family is the mouse Brachyury (or T) gene product.
Amnion
Coturnix
Gene Expression Regulation, Developmental
In Situ Hybridization
Epithelium
Gastrula
The developmental stage that follows BLASTULA or BLASTOCYST. It is characterized by the morphogenetic cell movements including invagination, ingression, and involution. Gastrulation begins with the formation of the PRIMITIVE STREAK, and ends with the formation of three GERM LAYERS, the body plan of the mature organism.
Pregnancy
Mrj encodes a DnaJ-related co-chaperone that is essential for murine placental development. (1/343)
We have identified a novel gene in a gene trap screen that encodes a protein related to the DnaJ co-chaperone in E. coli. The gene, named Mrj (mammalian relative of DnaJ) was expressed throughout development in both the embryo and placenta. Within the placenta, expression was particularly high in trophoblast giant cells but moderate levels were also observed in trophoblast cells of the chorion at embryonic day 8.5, and later in the labyrinth which arises from the attachment of the chorion to the allantois (a process called chorioallantoic fusion). Insertion of the ROSAbetageo gene trap vector into the Mrj gene created a null allele. Homozygous Mrj mutants died at mid-gestation due to a failure of chorioallantoic fusion at embryonic day 8.5, which precluded formation of the mature placenta. At embryonic day 8.5, the chorion in mutants was morphologically normal and expressed the cell adhesion molecule beta4 integrin that is known to be required for chorioallantoic fusion. However, expression of the chorionic trophoblast-specific transcription factor genes Err2 and Gcm1 was significantly reduced. The mutants showed no abnormal phenotypes in other trophoblast cell types or in the embryo proper. This study indicates a previously unsuspected role for chaperone proteins in placental development and represents the first genetic analysis of DnaJ-related protein function in higher eukaryotes. Based on a survey of EST databases representing different mouse tissues and embryonic stages, there are 40 or more DnaJ-related genes in mammals. In addition to Mrj, at least two of these genes are also expressed in the developing mouse placenta. The specificity of the developmental defect in Mrj mutants suggests that each of these genes may have unique tissue and cellular activities. (+info)Canine preprorelaxin: nucleic acid sequence and localization within the canine placenta. (2/343)
Employing uteroplacental tissue at Day 35 of gestation, we determined the nucleic acid sequence of canine preprorelaxin using reverse transcription- and rapid amplification of cDNA ends-polymerase chain reaction. Canine preprorelaxin cDNA consisted of 534 base pairs encoding a protein of 177 amino acids with a signal peptide of 25 amino acids (aa), a B domain of 35 aa, a C domain of 93 aa, and an A domain of 24 aa. The putative receptor binding region in the N'-terminal part of the canine relaxin B domain GRDYVR contained two substitutions from the classical motif (E-->D and L-->Y). Canine preprorelaxin shared highest homology with porcine and equine preprorelaxin. Northern analysis revealed a 1-kilobase transcript present in total RNA of canine uteroplacental tissue but not of kidney tissue. Uteroplacental tissue from two bitches each at Days 30 and 35 of gestation were studied by in situ hybridization to localize relaxin mRNA. Immunohistochemistry for relaxin, cytokeratin, vimentin, and von Willebrand factor was performed on uteroplacental tissue at Day 30 of gestation. The basal cell layer at the core of the chorionic villi was devoid of relaxin mRNA and immunoreactive relaxin or vimentin but was immunopositive for cytokeratin and identified as cytotrophoblast cells. The cell layer surrounding the chorionic villi displayed specific hybridization signals for relaxin mRNA and immunoreactivity for relaxin and cytokeratin but not for vimentin, and was identified as syncytiotrophoblast. Those areas of the chorioallantoic tissue with most intense relaxin immunoreactivity were highly vascularized as demonstrated by immunoreactive von Willebrand factor expressed on vascular endothelium. The uterine glands and nonplacental uterine areas of the canine zonary girdle placenta were devoid of relaxin mRNA and relaxin. We conclude that the syncytiotrophoblast is the source of relaxin in the canine placenta. (+info)Cortisol in fetal fluids and the fetal adrenal at parturition in the tammar wallaby (Macropus eugenii). (3/343)
Glucocorticoid hormones may play a critical role in initiating parturition in tammar wallabies. In this study, we investigated the concentration of cortisol in fetal fluids and cortisol production by fetal adrenals over the last 3 days of the 26-day pregnancy and within 24 h postpartum. The fetal adrenals almost doubled in size between Days 24 and 26 of pregnancy, and their cortisol content increased over 10-fold during this period, from 10 pg to over 100 pg per adrenal pair. After birth, neonatal adrenals continued to grow, but cortisol content fell dramatically to 20 pg. The prepartum increase in adrenal cortisol was reflected by a substantial rise in cortisol concentrations in yolk sac fluid, allantoic fluid, and fetal blood, which were below 10 ng/ml on Day 24 and rose to over 40 ng/ml by Day 26. Cortisol concentrations in neonatal blood decreased postpartum, mirroring decreased cortisol content in neonatal adrenals. Cortisol production by the fetal adrenal was stimulated in vitro by ACTH and prostaglandin E2, suggesting that the in vivo increase may be stimulated by release of ACTH from the fetal hypothalamic-pituitary axis and prostaglandin E2 from the placenta. These results indicate that increasing cortisol production by the fetal adrenal is a characteristic of late pregnancy in the tammar wallaby and support the suggestion that fetal cortisol may trigger the initiation of parturition in this marsupial species. (+info)Bmp4 is required for the generation of primordial germ cells in the mouse embryo. (4/343)
In many organisms the allocation of primordial germ cells (PGCs) is determined by the inheritance of maternal factors deposited in the egg. However, in mammals, inductive cell interactions are required around gastrulation to establish the germ line. Here, we show that Bmp4 homozygous null embryos contain no PGCs. They also lack an allantois, an extraembryonic mesodermal tissue derived, like the PGCs, from precursors in the proximal epiblast. Heterozygotes have fewer PGCs than normal, due to a reduction in the size of the founding population and not to an effect on its subsequent expansion. Analysis of beta-galactosidase activity in Bmp4(lacZneo) embryos reveals that prior to gastrulation, Bmp4 is expressed in the extraembryonic ectoderm. Later, Bmp4 is expressed in the extraembryonic mesoderm, but not in PGCs. Chimera analysis indicates that it is the Bmp4 expression in the extraembryonic ectoderm that regulates the formation of allantois and primordial germ cell precursors, and the size of the founding population of PGCs. The initiation of the germ line in the mouse therefore depends on a secreted signal from the previously segregated, extraembryonic, trophectoderm lineage. (+info)Identification of endothelial cell binding sites on the laminin gamma 1 chain. (5/343)
The laminins belong to a family of trimeric basement membrane glycoproteins with multiple domains, structures, and functions. Endothelial cells bind laminin-1 and form capillary-like structures when plated on a laminin-1-rich basement membrane matrix, Matrigel. Laminin-1 is composed of 3 chains, alpha1, beta1, and gamma1. Because laminin-1 is known to contain multiple biologically active sites, we have screened 156 synthetic overlapping peptides spanning the entire laminin gamma1 chain for potential angiogenic sequences. Only 7 of these peptides, designated as C16, C25, C30, C38, C64, C75, and C102, disrupted the formation of capillary-like structures by human umbilical vein endothelial cells on Matrigel. Dose-response experiments in the presence of 50 to 200 microg/mL showed that tube formation was prevented by most peptides at 150 and 200 microg/mL, except for C16, which showed strong activity at all concentrations. Active peptides promoted vessel sprouting from aorta rings and angiogenesis in the chick chorioallantoic membrane assay. In addition, the active peptides also promoted endothelial cell adhesion to dishes coated with 0.1 microg of peptide and inhibited attachment to laminin-1 but not to plastic or fibronectin. Four of the active peptides, C25, C38, C75, and C102, may have cell-type specificity with endothelial cells, since they did not promote PC12 neurite outgrowth or adhesion of B16-F10 melanoma and human submandibular gland cells. These results suggest that specific laminin gamma1-chain peptides have angiogenic activity with potential therapeutic applications. (+info)Human erythropoietin induces a pro-angiogenic phenotype in cultured endothelial cells and stimulates neovascularization in vivo. (6/343)
Hematopoietic and endothelial cell lineages share common progenitors. Accordingly, cytokines formerly thought to be specific for the hematopoietic system have been shown to affect several functions in endothelial cells, including angiogenesis. In this study, we investigated the angiogenic potential of erythropoietin (Epo), the main hormone regulating proliferation, differentiation, and survival of erythroid cells. Epo receptors (EpoRs) have been identified in the human EA.hy926 endothelial cell line by Western blot analysis. Also, recombinant human Epo (rHuEpo) stimulates Janus Kinase-2 (JAK-2) phosphorylation, cell proliferation, and matrix metalloproteinase-2 (MMP-2) production in EA.hy926 cells and significantly enhances their differentiation into vascular structures when seeded on Matrigel. In vivo, rHuEpo induces a potent angiogenic response in the chick embryo chorioallantoic membrane (CAM). Accordingly, endothelial cells of the CAM vasculature express EpoRs, as shown by immunostaining with an anti-EpoR antibody. The angiogenic response of CAM blood vessels to rHuEpo was comparable to that elicited by the prototypic angiogenic cytokine basic fibroblast growth factor (FGF2), it occurred in the absence of a significant mononuclear cell infiltrate, and it was not mimicked by endothelin-1 (ET-1) treatment. Taken together, these data demonstrate the ability of Epo to interact directly with endothelial cells and to elicit an angiogenic response in vitro and in vivo and thus act as a bona fide direct angiogenic factor. (+info)Purine analogue 6-methylmercaptopurine riboside inhibits early and late phases of the angiogenesis process. (7/343)
Angiogenesis has been identified as an important target for antineoplastic therapy. The use of purine analogue antimetabolites in combination chemotherapy of solid tumors has been proposed. To assess the possibility that selected purine analogues may affect tumor neovascularization, 6-methylmercaptopurine riboside (6-MMPR), 6-methylmercaptopurine, 2-aminopurine, and adenosine were evaluated for the capacity to inhibit angiogenesis in vitro and in vivo. 6-MMPR inhibited fibroblast growth factor-2 (FGF2)-induced proliferation and delayed the repair of mechanically wounded monolayer in endothelial GM 7373 cell cultures. 6-MMPR also inhibited the formation of solid sprouts within fibrin gel by FGF2-treated murine brain microvascular endothelial cells and the formation of capillary-like structures on Matrigel by murine aortic endothelial cells transfected with FGF2 cDNA. 6-MMPR affected FGF2-induced intracellular signaling in murine aortic endothelial cells by inhibiting the phosphorylation of extracellular signal-regulated kinase-2. The other molecules were ineffective in all of the assays. In vivo, 6-MMPR inhibited vascularization in the chick embryo chorioallantoic membrane and prevented blood vessel formation induced by human endometrial adenocarcinoma specimens grafted onto the chorioallantoic membrane. Also, topical administration of 6-MMPR caused the regression of newly formed blood vessels in the rabbit cornea. Thus, 6-MMPR specifically inhibits both the early and the late phases of the angiogenesis process in vitro and exerts a potent anti-angiogenic activity in vivo. These results provide a new rationale for the use of selected purine analogues in combination therapy of solid cancer. (+info)Functional involvement of carbonic anhydrase in calcium transport of the chick chorioallantoic membrane. (8/343)
Carbonic anhydrase activity was demonstrated in the chick-embryonic chorioallantoic membrane and was correlated with the Ca2+-transport activity of the membrane. It is inhibited by sulphonamides and is expressed in the chorioallantoic membrane in an age-dependent fashion during embryonic development. Ca2+ uptake by the chorioallantoic membrane in vivo also increases in a similar age-dependent manner. The temporal increase in these activities is coincident with calcium deposition in the embryonic skeleton. Incubation of the chorioallantoic membrane in ovo with sulphonamides specifically inhibits both the carbonic anhydrase and the Ca2+ uptake activities of the membrane in vivo. Enzyme histochemistry revealed the carbonic anhydrase activity is localized in the Ca2+-transporting ectodermal cells of the chorioallantoic membrane. These results, taken together, indicate that carbonic anhydrase may be functionally important in the Ca2+-transport activity of the chorioallantoic membrane. (+info)
Allantois - Wikipedia
Acetylcholinesterase Inhibitors Promote Angiogenesis in Chick Chorioallantoic Membrane and Inhibit Apoptosis of Endothelial...
IJMS | Free Full-Text | Molecular Mechanisms of (R,R)ZX-5 on NO Synthesis and Its Anti-Angiogenic Effect
Biology Practice Test 6 | GRE SAT LSAT GED TOEFL MCAT ACT IELTS GMAT Test Prep
An in vivo neovascularization assay for screening regulators of angiogenesis and assessing their effects on pre-existing vessels
Gene Expression Literature Detail
BIOETYMOLOGY : ORIGIN IN BIOMEDICAL TERMS: allantochorion
Order Ambien From India - xiloteca.com
BIOETYMOLOGY : ORIGIN IN BIOMEDICAL TERMS: allantois
Cow Fetus | ClipArt ETC
Allantoic | Definition of Allantoic by Merriam-Webster
Angiogenic activity of multiple myeloma endothelial cells in vivo in the chick embryo chorioallantoic membrane assay is...
Desmin-positive pericytes in the chick embryo chorioallantoic membrane in response to fibroblast growth factor-2<...
Chorioallantoic membrane - Wikipedia
IJMS | Free Full-Text | Chick Chorioallantoic Membrane (CAM) Assay as an In Vivo Model to Study the Effect of Newly Identified...
Biol. Res. -
vol.45 issue2
An oriental herbal cocktail, ka-mi-kae-kyuk-tang, exerts anti-cancer activities by targeting angiogenesis, apoptosis and...
VHL | Cancer Genetics Web
VITRIFICATION AND CHORIOALLANTOIC MEMBRANE (CAM) CULTURE OF BOVINE OVARIAN TISSUE
A quantitative study of the chorioallantoic membrane reaction in the chick embryo | Proceedings of the Royal Society of London...
Specific antigens from tumors after prolonged cultivation on the chorioallantoic membrane of the chick embryo | SpringerLink
Inhibition of trophoblast stem cell potential in chorionic ectoderm coincides with occlusion of the ectoplacental cavity in the...
Plus it
Chorioallantoic placenta definition | Drugs.com
OSA | In vivo blood flow imaging by a swept laser source based Fourier domain optical Doppler tomography
A Critical Period for the Turning of Hens Eggs | Development
Week 3 Development Movie - Embryology
Applications Of Functional Analysis In Mathematical Physics Translations Of Mathematical Monographs Vol 7
Viola tricolor Induces Apoptosis in Cancer Cells and Exhibits Antiangiogenic Activity on Chicken Chorioallantoic Membrane -...
Retinoic acid-induced glandular metaplasia in mouse skin is linked to the dermal expression of retinoic acid receptor β mRNA<...
NCI Thesaurus
Plus it
Micro mass - BET-bromodomain inhibition research
NJOGU, A., OWITI, G.E.O. PERSSON, E. & ODUOR- OKELO (2006) Ultrastructure of the chorioallantoic placenta and chorionic vesicle...
Difference between revisions of BGD Lecture - Gastrointestinal System Development - Embryology
Angiogenesis within Stem Cell-Seeded Silk Scaffolds Cultured on the Chorioallantoic Membrane and Visualized by 3D Imaging -...
The Embryonic Membranes - Chromoscience
PLACENTA IN MAMMALS-STRUCTURE-TYPES AND FUNCTIONS | BIOZOOM
Cloning, sequencing, expression and function of a cDNA encoding a receptor for the opioid growth factor, [Met(5)]enkephalin. -...
Most recent papers with the keyword Osmolarity | Read by QxMD
In ovo administration of human recombinant leptin shows dose dependent angiogenic effect on chicken chorioallantoic membrane |...
Dependence on nuclear localization signals of the opioid growth factor receptor in the regulation of cell proliferation<...
Integrin Targeted Therapeutics
Vitreous: an inhibitor of retinal extract-induced neovascularization. | IOVS | ARVO Journals
Rymy do słowa jesion
Rymy do słowa Reclamation
IN-EGG CHICK DEVELOPMENT IN PARROTS
Catecholamines and Cortisol in thermoregulation of chicken and duck embryos incubated under lowered temperature -...
Drug Discoveries & Therapeutics - Abstract
UABP - Uteroferrin Associated Basic Protein | AcronymFinder
Allantois
The allantois (plural allantoides or allantoises) is a hollow sac-like structure filled with clear fluid that forms part of a ... Also, most marsupial allantoises do not fuse with the chorion. An exception is the allantois of the bandicoot, which has a ... During fetal development, the allantois becomes the urachus, a duct between the bladder and the yolk sac. A patent allantois ... Oxygen is absorbed by the allantois through the egg shell. During the third week of embryonic development, the allantois ...
Wilhelm Krause
Ueber die Allantois des Menschen, 1875. Handbuch der menschlichen Anatomie. (Third edition of his father's work) 3 volumes; ...
Fetal membranes
The embryonic allantois becomes the fetal urachus, which connects the fetal bladder (developed from cloaca) to the yolk sac. ... In humans, the yolk sac is important in early embryonic blood supply, The human allantois is a caudal out-pouching of the yolk ... allantois, and yolk sac. The amnion and the chorion are the chorioamniotic membranes that make up the amniotic sac which ...
Reptiliomorpha
A very small allantois is found in modern amphibians. Later came the amnion surrounding the fetus proper, and the chorion, ... The first to evolve was probably the allantois, a sack that develops from the gut/yolk-sack. This sack contains the embryo's ... encompassing the amnion, allantois, and yolk-sack. Exactly where the border between reptile-like amphibians (non-amniote ...
Reptile
The allantois (8) is a sac that collects the metabolic waste produced by the embryo. The amniotic sac (10) contains amniotic ... An amnion, chorion, and allantois are present during embryonic life. The eggshell (1) protects the crocodile embryo (11) and ...
Development of the urinary system
In other words, the allantois takes no share in its formation. After the separation of the rectum from the dorsal part of the ... The vesico-urethral portion is the deepest, continuous with the allantois. It absorbs the ends of the Wolffian ducts and the ...
Chorion
To compensate for this, the chorion and the allantois fuse together to form the chorioallantoic membrane. Together these form a ... Diagram illustrating early formation of allantois and differentiation of body-stalk. Diagram showing later stage of allantoic ...
Development of the reproductive system
The vesico-urethral portion is the deepest portion, continuous with the allantois. It absorbs the ends of the mesonephric ducts ...
Notommata
Species: Notommata aethis Myers, 1933 Notommata allantois Wulfert, 1935 "Notommata Ehrenberg, 1830". www.gbif.org. Retrieved 5 ...
Urachal cyst
A urachal cyst is a sinus remaining from the allantois during embryogenesis. It is a cyst which occurs in the remnants between ...
Median umbilical ligament
It contains the urachus, which is the obliterated form of the allantois. The allantois forms a communication between the cloaca ... The median umbilical ligament begins as the allantois in the embryonic period. It then becomes the urachus in the fetus. This ...
Development of the gonads
Germ cells migrate from near the allantois and colonize the primordial gonads. In the female, the germ cells colonise the ...
Chorioallantoic membrane
Development of the allantois occurs extra embryonically from the ventral wall of the endodermal hindgut. Partial fusion of the ... It is formed by the fusion of the mesodermal layers of two extra-embryonic membranes - the chorion and the allantois. It is the ... The development of the CAM is similar to that of the allantois in mammals. Its growth starts from day 3 of embryonic ... chorion and allantois occurs between days 5 and 6. By day 10, there is an extensive formation of capillary network. The ...
TBX15
Embryonic death occurs around 10 days due to the failure to form the allantois. Tbx15 plays a relatively minor role within this ...
Keith Dumbell
... allantois of chick embryos". The Journal of Pathology and Bacteriology. 59: 189-198. PMID 20266361.{{cite journal}}: CS1 maint ...
Umbilical cord
The umbilical cord develops from and contains remnants of the yolk sac and allantois. It forms by the fifth week of development ...
TBX4
... has been shown to be expressed in the allantois, hindlimb, lung and proctodeum. Expression of Tbx4 is activated by a ... embryos with the Tbx4-mutant gene were observed to have allantoises that were apoptotic, stunted, and displayed abnormal ... "Identity and Fate of Tbx4-Expressing Cells Reveal Developmental Cell Fate Decisions in the Allantois, Limb, and External ... various abnormalities were observed in the development of the allantois. Choirioallantoic fusion fails to occur in embryos with ...
Placenta
... l mammals, including humans, have a chorioallantoic placenta that forms from the chorion and allantois. In humans, the ...
Urachal diverticulum
... is a congenital disorder caused by the partial persistence of the allantois. The allantois, which later becomes the urachus, ...
Amnion
The amnios consists of two layers:one is the granular layer, continued upon the inner or foetal surface of the allantois, and ... The amnion, along with the chorion, the yolk sac and the allantois protect the embryo. In birds, reptiles and monotremes, the ... In elephants, "The amnios is continued from the base of the umbilical cord upon the allantois, which is of considerable size, ... Opened uterus with cat fetus in midgestation: 1 umbilicus, 2 amniotic sac (chorion and amnion), 3 allantois, 4 yolk sac, 5 ...
Urorectal septum
a ventral part, forming the urogenital sinus, which forms the allantois, which becomes the urinary bladder. The urorectal ...
Allantoin
... are allantois acid, or the same substance that one found in the allantois fluid of cows; we will call it "allantoin" from now ... In 1821, the French chemist Jean Louis Lassaigne found it in the fluid of the allantois; he called it "l'acide allantoique". In ... Named after the allantois (an amniote embryonic excretory organ in which it concentrates during development in most mammals ...
Callophrys xami
In Mexico, Echevelia gibbiflora and Sedum allantoides are the most common host plants. The role of host plants is integral to ...
Embryo drawing
Haeckel speculates that the allantois is formed in a similar way in both humans and other mammals. His, on the other hand, ... Although Haeckel is proven right about the allantois, the utilization of Krause's embryo as justification turns out to be ...
Urinary bladder
The human urinary bladder derives from the urogenital sinus, and it is initially continuous with the allantois. The upper and ...
Cloaca (embryology)
The hind-gut is at first prolonged backward into the body-stalk as the tube of the allantois; but, with the growth and flexure ... and consequently a bend is formed at the junction of the hind-gut and allantois. This bend becomes dilated into a pouch, which ... constitutes the endodermal cloaca; into its dorsal part the hind-gut opens, and from its ventral part the allantois passes ...
Blood islands
... arise external to the developing embryo on the umbilical vesicle, allantois, connecting stalk and chorion. They ... They develop from undifferentiated hemangioblasts in blood vessels in the walls of the umbilical vesicle, allantois and chorion ...
Excretory system
Embryologically, the bladder is derived from the urogenital sinus, and it is initially continuous with the allantois. In human ...
2009 swine flu pandemic vaccine
The virus replicates within the allantois of the embryo, which is the equivalent of the placenta in mammals. The fluid in this ...
Retinol-binding protein
RBP mRNA was localized to epithelial cells of the chorion, allantois, and amnion at day 45 of pregnancy. Lastly, RBP mRNA was ...
Loss of Tbx4 blocks hindlimb development and affects vascularization and fusion of the allantois | Development | The Company of...
Allantois development in Tbx4 mutants. Tbx4 mutants first exhibit a defect at 8.0 dpc, when they demonstrate a short allantois ... 3G) allantoises. Tbx2 is expressed in the wild-type allantois(Fig. 3H) from its earliest morphological appearance until early ... The mutant allantois shows dense, irregularly packed cells in the base of the allantois, with multiple double-walled vesicles( ... Blood vessels running through the allantois are visible(Fig. 2K). By contrast, the allantois of a mutant at this stage (n=1) ...
Equine Immunity From Birth to Old Age - The Horse
Endothelin-1, a regulator of angiogenesis in the chick chorioallantoic membrane
We investigated the angiogenic properties of endothelin-1 (ET-1) using a novel experimental approach involving the constant production and release of ET-1, which was achieved by grafting stably transfected Chinese hamster ovary (CHO) (CHO-ET-1) cell aggregates onto the chorioallantoic membrane (CAM) …
animal development - Adaptations in mammals | Britannica
The blood-vessel network of the underlying allantois conveys nutrients that diffuse through the trophoblast to the body of the ... In higher mammals, the cavity of the allantois is reduced, but the allantoic blood vessels become well developed and extend ... the allantois also develops. The embryo proper, lying in the amniotic cavity, is connected to the extra-embryonic parts by the ... and allantois. A cavity appears within the morula, converting it into a hollow embryo, called the blastocyst. This cavity ...
Disorders of the Umbilicus Workup: Laboratory Studies, Imaging Studies, Histologic Findings
Breaching the Weismann barrier
Disorders of the Umbilicus Treatment & Management: Approach Considerations, Medical Therapy, Surgical Therapy
Advanced Search Results - Public Health Image Library(PHIL)
IndexCat
Publication Detail
All Phenotypes Chrd
Shadows of Evolution - Apologetics Press
ALLANTOID English Definition and Meaning | Lexico.com
Influenza virus neuraminidase contributes to secondary bacterial pneumonia - PubMed
Amniota - Everything2.com
Yolk Sac Tumor (Endodermal Sinus Tumors, Primitive Endodermal Tumors) Pathology: Definition, Epidemiology, Etiology
Squidpy: a scalable framework for spatial omics analysis | Nature Methods
Positive enrichment is found for the following cluster pairs: Lateral plate mesoderm with Allantois and Intermediate ... Allantois with Mixed mesenchymal mesoderm, Erythroid with Low quality, Presomitic mesoderm with Dermomyotome and ... Allantois and Intermediate mesoderm clusters, Endothelium with Hematoendothelial progenitors; Fig. 2b) are consistent ...
Hydrops fetalis - Wikipedia
Extensive load of somatic CNVs in the human placenta | Scientific Reports
What's in an Egg? - creation.com
Embryonic Development | Encyclopedia.com
Protocol for Metagenomic Virus Detection in Clinical Specimens - Volume 21, Number 1-January 2015 - Emerging Infectious...
PAR-13-231: Phenotyping Embryonic Lethal Knockout Mice (R01)
Famous People are Quoted Concerning Evolution - Creation Studies Institute
Application of the Chick Embryo Chorioallantoic Membrane in Neurosurgery Disease
A note on the survival and growth of human and rabbit tissues (normal and neoplastic) on the chorio-allantois of the chick and ... At 3.5 days of incubation, the allantois of the chick embryo appears as an evagination from the ventral wall of the endodermal ... At 4.5 days of incubation, the allantois pushes out of the body of the embryo into the extraembryonic coelom. Its proximal ... Fluid accumulation distends the allantois so that its terminal portion resembles a balloon [2, 3, 31]. An extensive ...
What's Wrong With His Belly Button? | Pediatric Case and Reference Article | Pediatric Education
The allantois develops in the human embryo on the 16th day of embryogenesis. It develops from the posterior portion of the yolk ... The allantois is usually obliterated during embryogenesis, but a remnant may persist. This remnant connects from the umbilicus ... Around the end of the 3rd month of embryogenesis, all that should remain externally of the original allantois and vitelline ...
Hedgehog induction of murine vasculogenesis is mediated by Foxf1 and Bmp4<...
We show in the allantois that genetic disruption of hedgehog signaling (Smo(-/-)) has no effect on Foxf1 expression, and ... We show in the allantois that genetic disruption of hedgehog signaling (Smo(-/-)) has no effect on Foxf1 expression, and ... We show in the allantois that genetic disruption of hedgehog signaling (Smo(-/-)) has no effect on Foxf1 expression, and ... We show in the allantois that genetic disruption of hedgehog signaling (Smo(-/-)) has no effect on Foxf1 expression, and ...
ChorionAmnionYolkUrachusMembraneRemnantConnects the developBladderVitellineHindgutCavityDevelopsUrinaryAlcoholFormationHumanProcessSkinEmbryoChorionAmnioticChorio-allantoisEmbryo'sMembranesExtraembryonic membraneCloacaEmbryosFluidFetalNeuralUrogenital sinusUrinaryCellsInflammationCanalDevelopmentShowExchangeFearFeatures
Chorion7
- The amniotes are the evolutionary branch (called clade) of the tetrapods (which are superclass Tetrapoda), where the embryo develops within a set of protective extra-embryonic membranes - the chorion, amnion, and allantois. (vedantu.com)
- The chorion, amnion, and allantois of the amniotes likely evolved from the embryonic tissue layer by encasing a large yolk mass. (vedantu.com)
- Allantois forms as an out-pocketing of the hindgut of the embryo and grow outward into the space between the chorion and amnion. (vedantu.com)
- In birds and reptiles, the chorion, amnion, and allantois are further protected by a leathery or hard calcareous shell. (vedantu.com)
- Zoologists characterize amniotes in part by embryonic development, which includes the formation of many extensive membranes, the chorion, amnion, and allantois. (vedantu.com)
- The yolk sac, amnion , chorion , and allantois are the four extraembryonic membranes that lie outside of the embryo and are involved in providing nutrients and protection to the developing embryo. (humpath.com)
- The third membrane is the allantois, and the fourth is the chorion which surrounds the embryo after about a month and eventually fuses with the amnion. (humpath.com)
Amnion3
- A reconstruction of half of a 13-day embryo (7801) showing the features of the embryo proper and the relations of its extraembryonic membranes (amnion, trophoblast, allantois, yolk sac and connecting stalk). (ehd.org)
- Allantois breaks through amnion. (bittergame.com)
- Embryo becomes chick, breaks amnion, starts breathing air in air cell Allantois ceases to function and starts to dry up. (bittergame.com)
Yolk1
- Differentiation of primordial germ cells (PGC) occurs from epiblast-derived cells present in the yolk sac near the base of the allantois. (endotext.org)
Urachus5
- The urachus is a remnant of the allantois, a connection between the fetal bladder and the umbilical cord. (cytojournal.com)
- Patent urachus results when there is a persistence of an allantois remnant which normally undergoes atresia during embryological development. (elsevier.com)
- The ventral surface of the cloaca (which becomes the urogenital sinus) is continuous with the allantois, which degenerates after birth to form the urachus and eventually the median umbilical ligament (an embryological remnant with no clinical significance). (pediagenosis.com)
- Urachus is an embryologic remnant of allantois, which in adults presents as medial umbilical ligament connecting the dome of the bladder to the umbilicus. (hellenicurologyjournal.com)
- Urachus is an embryologic remnant, developed by the obliteration of the allantois. (hellenicurologyjournal.com)
Membrane2
- The amniotic membrane function is largely protective, but the allantois serves as a collection area for the waste materials and as a site of gas exchange. (vedantu.com)
- In most mammals and a few live-bearing lizards, a portion of the amniotic membrane and allantois forms the placenta, which is a vascular organ that facilitates the exchange of both the nutrients and waste products between the growing fetus and its mother. (vedantu.com)
Remnant1
- The allantois is usually obliterated during embryogenesis, but a remnant may persist. (pediatriceducation.org)
Connects the develop1
- It represents the passage which in the embryo connects the developing bladder with the allantois. (co.ma)
Bladder1
- The allantois also contributes to the upper parts of the bladder. (pediagenosis.com)
Vitelline1
- Around the end of the 3rd month of embryogenesis, all that should remain externally of the original allantois and vitelline ducts after all the folding of the midgut/abdominal area of the embryo is the umbilical cord with 2 arteries, 1 vein and Wharton's jelly to protect it. (pediatriceducation.org)
Hindgut1
- The allantois is visible coming off the hindgut. (lawrenceperegrines.com)
Cavity1
- Microscopicolly the umbilical cord of the dog possess proper aspects as the confluente of the umbilicais veins occurring next the abdominal cavity, the walis of the veins (2) are thin and arteries (2) are muscular and thick, allantois duct are between situated the four vasas. (usp.br)
Develops1
- The allantois develops in the human embryo on the 16th day of embryogenesis. (pediatriceducation.org)
Urinary1
- The allantois serves to store urinary wastes and mediate exchange of gas and nutrients for the developing embryo. (bvsalud.org)
Alcohol1
- It is usually in the liquid form, containing 70% alcohol, while the rest is glycerin and allantois. (leesrazors.com)
Formation1
- The process whose specific outcome is the progression of an allantois over time, from its formation to the mature structure. (virtualflybrain.org)
Human1
- Posterior regions of new genus of human allantois bifurcates. (historietas.net)
Process1
- The metazoon condition, but point opposite the dorsal surface of the allantois, assuming a finger-like process a. (historietas.net)
Skin1
- Features Allantois that soothes and alleviates sensitive skin. (bloomingkoco.com)
Embryo15
- The first expression of Tbx4 in the mouse embryo is observed at 7.5 days post coitus (dpc) in the developing allantois. (biologists.com)
- The allantois is an extra-embryonic, mesodermal structure that forms a connection between the posterior embryo and the chorion early in development. (biologists.com)
- The blood-vessel network of the underlying allantois conveys nutrients that diffuse through the trophoblast to the body of the embryo proper. (britannica.com)
- In higher mammals, the cavity of the allantois is reduced, but the allantoic blood vessels become well developed and extend through the umbilical cord, connecting the embryo to the placenta. (britannica.com)
- The location of the allantois in the developing human embryo. (creation.com)
- The allantois allows oxygen to reach the embryo and removes waste products from the embryo. (everything2.com)
- At 3.5 days of incubation, the allantois of the chick embryo appears as an evagination from the ventral wall of the endodermal hindgut. (medsci.org)
- At 4.5 days of incubation, the allantois pushes out of the body of the embryo into the extraembryonic coelom. (medsci.org)
- The allantois develops in the human embryo on the 16th day of embryogenesis. (pediatriceducation.org)
- Around the end of the 3rd month of embryogenesis, all that should remain externally of the original allantois and vitelline ducts after all the folding of the midgut/abdominal area of the embryo is the umbilical cord with 2 arteries, 1 vein and Wharton's jelly to protect it. (pediatriceducation.org)
- The allantois serves to store urinary wastes and mediate exchange of gas and nutrients for the developing embryo. (nih.gov)
- The human urinary bladder is derived in embryo from the urogenital sinus and, it is initially continuous with the allantois. (webmedcentral.com)
- the allantois stores the embryo's urinary wastes and contains blood vessels that bring the embryo oxygen and take away carbon dioxide. (zoogamy.com)
- The embryo disposes of wastes through the allantois, the part of the egg that connects the amnion to the albumin, or the "white of the egg. (sciencing.com)
- Recent work has formally demonstrated in chicken the presence of bona fide dHSC originating from the embryo aortas but not from the YS, allantois or head17. (healthappsopenday.com)
Chorion1
- In this process, the mesodermal layer of the allantois fuses with the adjacent mesodermal layer of the chorion to form the CAM. (medsci.org)
Amniotic1
- [1] By comparison, hydrops allantois or hydrops amnion is an accumulation of excessive fluid in the allantoic or amniotic space , respectively. (wikipedia.org)
Chorio-allantois1
- Embryoherz in der Chorio-Allantois des Hühnchens. (nih.gov)
Embryo's2
- Here is where the allantois is so crucial, as it serves as the embryo's garbage bag. (creation.com)
- AAT determines the sex of chicks using light, while Seleggt creates a fine hole in egg shells and takes a small amount of allantois fluid to assess the embryo's sex. (poultry.network)
Membranes1
- Mentre que els ous dels amfibis són relativament petits i només presenten una capa interna, els ous dels amniotes són força més grans i presenten vàries membranes protegint l'embrió i mantenint-lo en un medi aquós. (wordpress.com)
Extraembryonic membrane1
- 9. C The extraembryonic membrane that functions in respiration and excretion is the allantois. (schoolbag.info)
Cloaca1
- A cloaca is a common cavity in which the hindgut and allantois open. (medizzy.com)
Embryos4
- The allantoises of Tbx4 -mutant embryos are stunted, apoptotic and display abnormal differentiation. (biologists.com)
- Heterozygous embryos show a mild, transient growth defect in the allantois. (biologists.com)
- The expression of another, closely-linked, T-box gene, Tbx2 , is reduced in both the hindlimb and the allantois of Tbx4 -mutant embryos prior to the development of overt morphological abnormalities, which suggests that Tbx4 regulates Tbx2 in these tissues. (biologists.com)
- In these mice, malformations in the allantois, neural pipe and headfold are recognized by day time 8.5, with day time 10.5 embryos become necrotic and so are reabsorbed[32]. (thetechnoant.info)
Fluid1
- Fluid accumulation distends the allantois so that its terminal portion resembles a balloon [ 2 , 3 , 31 ]. (medsci.org)
Fetal1
- It is a remnant of the allantois, (which helped eliminate waste during fetal development). (simple-remedies.com)
Neural1
- They also had allantois malformation, neural tube defects and asymmetric headfolds. (pharmawiki.in)
Urogenital sinus1
- The primitive urogenital sinus is in contact with the allantois . (embryology.ch)
Urinary1
- Within the egg the allantois acts as a compartment for the storage of nitrogenous excretory products such as uric acid , and may remain after birth or hatching as the urinary bladder. (encyclopedia.com)
Cells2
- Endothelial cells within mutant allantoises do not undergo vascular remodeling. (biologists.com)
- The lineage of cells that are destined to become the germline will cluster on a structure called the allantois (figure 1). (creation.com)
Inflammation1
- And since it also has allantois and glycerin, aftershave splash also reduces skin inflammation and improves moisture content. (nakedarmor.com)
Canal1
- A cyst located along the allantois canal. (medicalphysicist.co.uk)
Development1
- Molecular pathways involved in development of the allantois are not well characterized. (biologists.com)
Show1
- We show in the allantois that genetic disruption of hedgehog signaling (Smo(-/-)) has no effect on Foxf1 expression, and neither Bmp4 expression nor vasculogenesis are disturbed. (ed.ac.uk)
Exchange1
- The (4) allantois is used for gas exchange. (org.ua)
Fear1
- Author(s): Sakamoto H, Sakamaki view индийская, Kanda heart, Kurabayashi M, Nagai R, Fujii J. Long-acting characteristic mortality, Allantois invention, and abstract temperature uncover obstructive fear cell of Nephrosis, identical RN, and network in sedatives with future muscle power. (augenta.net)
Features1
- Largely classified based on DNA sequence afrotherian mammals are diverse in morphology but share some common anatomical features (e.g., appearance of four‐lobed ALLANTOIS and long and mobile snout). (nih.gov)