Chorion: The outermost extra-embryonic membrane surrounding the developing embryo. In REPTILES and BIRDS, it adheres to the shell and allows exchange of gases between the egg and its environment. In MAMMALS, the chorion evolves into the fetal contribution of the PLACENTA.Egg Proteins: Proteins which are found in eggs (OVA) from any species.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.Amnion: The innermost membranous sac that surrounds and protects the developing embryo which is bathed in the AMNIOTIC FLUID. Amnion cells are secretory EPITHELIAL CELLS and contribute to the amniotic fluid.Bombyx: A genus of silkworm MOTHS in the family Bombycidae of the order LEPIDOPTERA. The family contains a single species, Bombyx mori from the Greek for silkworm + mulberry tree (on which it feeds). A native of Asia, it is sometimes reared in this country. It has long been raised for its SILK and after centuries of domestication it probably does not exist in nature. It is used extensively in experimental GENETICS. (From Borror et al., An Introduction to the Study of Insects, 4th ed, p519)Allantois: An extra-embryonic membranous sac derived from the YOLK SAC of REPTILES; BIRDS; and MAMMALS. It lies between two other extra-embryonic membranes, the AMNION and the CHORION. The allantois serves to store urinary wastes and mediate exchange of gas and nutrients for the developing embryo.Labor, Obstetric: The repetitive uterine contraction during childbirth which is associated with the progressive dilation of the uterine cervix (CERVIX UTERI). Successful labor results in the expulsion of the FETUS and PLACENTA. Obstetric labor can be spontaneous or induced (LABOR, INDUCED).Vitelline Membrane: The plasma membrane of the egg.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).Egg Shell: A hard or leathery calciferous exterior covering of an egg.Oryzias: The only genus in the family Oryziinae, order BELONIFORMES. Oryzias are egg-layers; other fish of the same order are livebearers. Oryzias are used extensively in testing carcinogens.Oogenesis: The process of germ cell development in the female from the primordial germ cells through OOGONIA to the mature haploid ova (OVUM).Ovum: A mature haploid female germ cell extruded from the OVARY at OVULATION.Trophoblasts: Cells lining the outside of the BLASTOCYST. After binding to the ENDOMETRIUM, trophoblasts develop into two distinct layers, an inner layer of mononuclear cytotrophoblasts and an outer layer of continuous multinuclear cytoplasm, the syncytiotrophoblasts, which form the early fetal-maternal interface (PLACENTA).Pregnancy: The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH.Decidua: The hormone-responsive glandular layer of ENDOMETRIUM that sloughs off at each menstrual flow (decidua menstrualis) or at the termination of pregnancy. During pregnancy, the thickest part of the decidua forms the maternal portion of the PLACENTA, thus named decidua placentalis. The thin portion of the decidua covering the rest of the embryo is the decidua capsularis.Gene Amplification: A selective increase in the number of copies of a gene coding for a specific protein without a proportional increase in other genes. It occurs naturally via the excision of a copy of the repeating sequence from the chromosome and its extrachromosomal replication in a plasmid, or via the production of an RNA transcript of the entire repeating sequence of ribosomal RNA followed by the reverse transcription of the molecule to produce an additional copy of the original DNA sequence. Laboratory techniques have been introduced for inducing disproportional replication by unequal crossing over, uptake of DNA from lysed cells, or generation of extrachromosomal sequences from rolling circle replication.Aedes: A genus of mosquitoes (CULICIDAE) frequently found in tropical and subtropical regions. YELLOW FEVER and DENGUE are two of the diseases that can be transmitted by species of this genus.Insect Proteins: Proteins found in any species of insect.Corchorus: A plant genus of the family TILIACEAE. Members contain cycloartane saponins and CARDENOLIDES.Encyclopedias as Topic: Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)Colubridae: The largest family of snakes, comprising five subfamilies: Colubrinae, Natricinae, Homalopsinae, Lycodontinae, and Xenodontinae. They show a great diversity of eating habits, some eating almost anything, others having a specialized diet. They can be oviparous, ovoviviparous, or viviparous. The majority of North American snakes are colubrines. Among the colubrids are king snakes, water moccasins, water snakes, and garter snakes. Some genera are poisonous. (Goin, Goin, and Zug, Introduction to Herpetology, 3d ed, pp321-29)European Union: The collective designation of three organizations with common membership: the European Economic Community (Common Market), the European Coal and Steel Community, and the European Atomic Energy Community (Euratom). It was known as the European Community until 1994. It is primarily an economic union with the principal objectives of free movement of goods, capital, and labor. Professional services, social, medical and paramedical, are subsumed under labor. The constituent countries are Austria, Belgium, Denmark, Finland, France, Germany, Greece, Ireland, Italy, Luxembourg, Netherlands, Portugal, Spain, Sweden, and the United Kingdom. (The World Almanac and Book of Facts 1997, p842)Pregnancy Outcome: Results of conception and ensuing pregnancy, including LIVE BIRTH; STILLBIRTH; SPONTANEOUS ABORTION; INDUCED ABORTION. The outcome may follow natural or artificial insemination or any of the various ASSISTED REPRODUCTIVE TECHNIQUES, such as EMBRYO TRANSFER or FERTILIZATION IN VITRO.Pregnancy Complications: Conditions or pathological processes associated with pregnancy. They can occur during or after pregnancy, and range from minor discomforts to serious diseases that require medical interventions. They include diseases in pregnant females, and pregnancies in females with diseases.Pregnancy, Animal: The process of bearing developing young (EMBRYOS or FETUSES) in utero in non-human mammals, beginning from FERTILIZATION to BIRTH.Fertilization: The fusion of a spermatozoon (SPERMATOZOA) with an OVUM thus resulting in the formation of a ZYGOTE.Fertilization in Vitro: An assisted reproductive technique that includes the direct handling and manipulation of oocytes and sperm to achieve fertilization in vitro.Strikes, Employee: Work-related situations in which the employees as a group refuse to work until certain conditions of employment are granted by the employer.Sexual Behavior: Sexual activities of humans.Human Development: Continuous sequential changes which occur in the physiological and psychological functions during the life-time of an individual.Sexual Development: The processes of anatomical and physiological changes related to sexual or reproductive functions during the life span of a human or an animal, from FERTILIZATION to DEATH. These include SEX DETERMINATION PROCESSES; SEX DIFFERENTIATION; SEXUAL MATURATION; and changes during AGING.Lactation: The processes of milk secretion by the maternal MAMMARY GLANDS after PARTURITION. The proliferation of the mammary glandular tissue, milk synthesis, and milk expulsion or let down are regulated by the interactions of several hormones including ESTRADIOL; PROGESTERONE; PROLACTIN; and OXYTOCIN.Reproduction: The total process by which organisms produce offspring. (Stedman, 25th ed)Adolescent Development: The continuous sequential physiological and psychological changes during ADOLESCENCE, approximately between the age of 13 and 18.Dictionaries, MedicalDictionaries as Topic: Lists of words, usually in alphabetical order, giving information about form, pronunciation, etymology, grammar, and meaning.Abruptio Placentae: Premature separation of the normally implanted PLACENTA from the UTERUS. Signs of varying degree of severity include UTERINE BLEEDING, uterine MUSCLE HYPERTONIA, and FETAL DISTRESS or FETAL DEATH.Dictionaries, ChemicalArchivesBiological Science Disciplines: All of the divisions of the natural sciences dealing with the various aspects of the phenomena of life and vital processes. The concept includes anatomy and physiology, biochemistry and biophysics, and the biology of animals, plants, and microorganisms. It should be differentiated from BIOLOGY, one of its subdivisions, concerned specifically with the origin and life processes of living organisms.Periodicals as Topic: A publication issued at stated, more or less regular, intervals.PubMed: A bibliographic database that includes MEDLINE as its primary subset. It is produced by the National Center for Biotechnology Information (NCBI), part of the NATIONAL LIBRARY OF MEDICINE. PubMed, which is searchable through NLM's Web site, also includes access to additional citations to selected life sciences journals not in MEDLINE, and links to other resources such as the full-text of articles at participating publishers' Web sites, NCBI's molecular biology databases, and PubMed Central.Directories as Topic: Lists of persons or organizations, systematically arranged, usually in alphabetic or classed order, giving address, affiliations, etc., for individuals, and giving address, officers, functions, and similar data for organizations. (ALA Glossary of Library and Information Science, 1983)Receptors, CCR: Chemokine receptors that are specific for CC CHEMOKINES.Chemokine CCL19: A CC-type chemokine with specificity for CCR7 RECEPTORS. It has activity towards T LYMPHOCYTES and B LYMPHOCYTES.Trypanosoma brucei brucei: A hemoflagellate subspecies of parasitic protozoa that causes nagana in domestic and game animals in Africa. It apparently does not infect humans. It is transmitted by bites of tsetse flies (Glossina).Semaphorin-3A: The prototypical and most well-studied member of the semaphorin family. Semaphorin-3A is an axon-repulsive guidance cue for migrating neurons in the developing nervous system. It has so far been found only in vertebrates, and binds to NEUROPILIN-1/plexin complex receptors on growth cones. Like other class 3 semaphorins, it is a secreted protein.Protozoan Proteins: Proteins found in any species of protozoan.PhrasesSubcellular Fractions: Components of a cell produced by various separation techniques which, though they disrupt the delicate anatomy of a cell, preserve the structure and physiology of its functioning constituents for biochemical and ultrastructural analysis. (From Alberts et al., Molecular Biology of the Cell, 2d ed, p163)
... forming chorion frondosum. Villi on the opposite side (abembryonic pole) degenerate and form the chorion laeve (or chorionic ... The decidual plate is tightly attached to the chorion frondosum and goes on to form the actual placenta. Endometrium on the ... The endometrium (from the mother) over the chorion frondosum (this part of the endometrium is called the decidua basalis) forms ... This fuses with the chorion laevae, thus filling up the uterine cavity. In the case of twins, dichorionic placentation refers ...
The placenta functions as a fetomaternal organ with two components: the fetal placenta (Chorion frondosum), which develops from ... Placental mammals, such as humans, have a chorioallantoic placenta that forms from the chorion and allantois. In humans, the ... In humans and other hemochorial placentals, the maternal blood comes into direct contact with the fetal chorion, though no ...
... and hence this part is named the chorion frondosum. Thus the placenta develops from the chorion frondosum and the decidua ... this is also named the non-placental part of the chorion. As the chorion grows, the chorion laeve comes in contact with the ... This part of the chorion becomes smooth, and is named the chorion laeve (from the Latin word levis, meaning smooth). As it ... For the entertainment company see Chorion (company). The chorion is the outermost fetal membrane around the embryo in mammals, ...
The placenta functions as a fetomaternal organ with two components:[2] the fetal placenta (Chorion frondosum), which develops ... Placental mammals, such as humans, have a chorioallantoic placenta that forms from the chorion and allantois. In humans, the ... In humans and other hemochorial placentals, the maternal blood comes into direct contact with the fetal chorion, though no ...
... and hence this part is named the chorion frondosum. Thus the placenta develops from the chorion frondosum and the decidua ... this is also named the non-placental part of the chorion. As the chorion grows, the chorion laeve comes in contact with the ... This part of the chorion becomes smooth, and is named the chorion laeve (from the Latin word levis, meaning smooth). As it ... For the entertainment company see Chorion (company). The chorion is the outermost fetal membrane around the embryo in mammals, ...
... forming chorion frondosum. Villi on the opposite side (abembryonic pole) degenerate and form the chorion laeve (or chorionic ... The decidual plate is tightly attached to the chorion frondosum and goes on to form the actual placenta. Endometrium on the ... The endometrium (from the mother) over the chorion frondosum (this part of the endometrium is called the decidua basalis) forms ... This fuses with the chorion laevae, thus filling up the uterine cavity. In the case of twins, dichorionic placentation refers ...
Chorion frondosum. *. E. Amniochorionic membrane. *. 8. Which of the following characterizes the changes in the endometrium in ...
... leaving the smooth chorion, now called the chorion laeve. The chorion frondosum is that part of the conceptus that forms as the ... The discus-shaped placenta develops from the chorion frondosum and the decidua basalis. ... The amnion, a thinner membrane, is adherent to and covers the inner surface of the chorion. The inner or fetal surface of the ... The technique of retrieving a sample of villi from the chorion (outer embryonic membrane) within the uterus is similar to ...
as embryo expands, villi degenerate - that area = chorion laevae (smooth chorion). develop into placenta over chorion frondosum ...
Chorioamnionitis is inflammation of the amnion and chorion by maternal neutrophils, indicating ascending infection (especially ... The decidua basalis corresponds with the chorion frondosum 3 What are the contents of the umbilical cord? ...
Placenta > Chorion Frondosum * Placenta > Chorionic Villus * Placenta > Column Cytotrophoblast Layer * Placenta > Extravillous ...
Identify the chorion frondosum (villous chorion), as well as the edge of the chorion laeve (smooth chorion). ... Identify the chorion frondosum (villous chorion), as well as the edge of the chorion laeve (smooth chorion). ... PLACENTA - Fetal part develops from the chorionic sac ( chorion frondosum ) ... * DEVELOPMENT OF PLACENTA Until the beginning ... Fetal part develops from the chorionic sac ( chorion frondosum ) ... * DEVELOPMENT OF PLACENTA Until the beginning of the 8th ...
Villi (chorion frondosum) cover the entire surface of the chorion. (Carnegie No. 8537A, ×1.5). ... Increased thickness of the placenta is the result of growth in the length and size of the villi of the chorion frondosum, with ... 2). The villi in contact with the decidua basalis proliferate to form the chorion frondosum, which is the fetal component of ... 8. Diagram of layers of amnion and chorion.(Bourne GL. The microscopic anatomy of the human amnion and chorion. Am J Obstet ...
This prenatal testing procedure involves taking a sample of the chorion frondosum-that part of the chorionic membrane ... The CVS procedure involves taking a sample of the chorion frondosum-the part of the chorionic membrane that contains the villi ... The CVS procedure involves taking a sample for laboratory analysis of the chorion frondosum-the part of the chorionic membrane ... The chorion is the outermost membrane surrounding the developing fetus; the amnion is the inner membrane that contains the ...
... and of the chorion frondosum, the placenta fcEtalis. The area throughout which the villi of the chorion frondosum remain ... Chorion Ltevt and Frondosum. The villi at first cover the entire surface of the chorion. As the embryo grows more and more out ... Chorion Frondosum.-The villi of this portion of the chorion form profusely branched tree-like structures which lie in the ... The embryo is attached first to the chorion frondosum by the body stalk (Figs. 77 B and 239), later by the umbilical cord (Fig ...
Foetal: Chorion frondosum & amnionic membrane * Describe the blood vessels of the placenta, and the sub-divisions ... Fetal, outer part of trophoblast cells called the chorion*Maternal, endometrium below the chorion is called decidua*Chorionic ... The amniotic sac is a tough but thin transparent pair of membranes (amnion and chorion), which hold a developing embryo (and ... Chorion: The outer membrane which contains the amnion and is part of the placenta.*. ...
It has two components, the fetal part (Chorion Frondosum), and the maternal part (Decidua Basailis). The placenta function is ...
... making up the chorionic villi covered by the chorion frondosum (plate) 8. The branched placental villi are bathed in maternal ... Many publications assume that cells isolated from the fetal chorion yield fetal MSC upon culture 14. However, as we have ... reported previously 5, all cultures derived from fetal chorion, using this protocol, rapidly become enriched for maternal MSC ... leaving the chorionic frondosum (chorionic plate) intact. ...
chorion frondosum. * The part of chorion where villi persist, forming fetal placenta. ...
The placenta consists of a fetal portion, the chorion frondosum, bearing many chorionic villi that interlock with the decidua ... chorion frondosum), and a maternal portion formed by a modification of the part of the uterine mucosa (decidua basalis) in ... The chorion, the superficial or fetal portion, is surfaced by a smooth, shining membrane continuous with the sheath of the ... A placenta in which the chorion forms villi.. zonary placenta. Annular placenta.. placenta. The part of the early developing ...
Structure of chorion frondosum (body structure). Code System Preferred Concept Name. Structure of chorion frondosum (body ... Structure of chorion frondosum (body structure) {37333001 , SNOMED-CT } Parent/Child (Relationship Type) Entire chorion ... Structure of chorion frondosum Current Synonym true false 62281011 Chorion frondosum Current Synonym true false ...
Entire chorion frondosum Current Synonym true false 383150011 Chorion frondosum Current Synonym true false ... Entire chorion frondosum (body structure). Code System Preferred Concept Name. Entire chorion frondosum (body structure). ...
... percutaneous transabdominal technique or the transvaginal/transcervical approach to collect a sample of the chorion frondosum, ... Canadian multicentre randomized clinical trial of chorion villus sampling and amniocentesis. Final report. Prenat Diagn. 1992 ...
Villi from the embryonic pole of the implanted blastocyst differentiate into the chorion frondosum and become placenta, whereas ... Development of the chorion. The first trimester of pregnancy. The initial stages of the chorion development have been ... Apoptosis in the chorion of fetal membranes in preterm premature rupture of membranes. Am J Perinatol. 2008;25:29-32. [PubMed] ... The role of chorionic cytotrophoblasts in the smooth chorion fusion with parietal decidua. Olga Genbacev,a,b,c Ljiljana Vicovac ...
The placenta consists of a fetal portion, the chorion frondosum, bearing many chorionic villi that interlock with the decidua ... The placenta consists of a fetal portion, the chorion frondosum, bearing many chorionic villi that interlock with the decidua ... It is a composite of several structures (decidua parietalis, decidua capsularis, chorion laeve, and amnion). At the center of ... It is a composite of several structures (decidua parietalis, decidua capsularis, chorion laeve, and amnion). At the center of ...
4. Villus from chorion frondosum. From a wax reconstruction by Mr, H. L. Houchins. X60 diameters. 5. Graphic reconstruction of ... in height, belong to the chorion frondosum. At their bases they are ordinarily smaller than farther out. One of this type is ... Chorion=== ====Chorionic Membrane==== The chorion forms a large vesicle, within the cavity of which lies the embryo. It is ... The stroma oi the chorion and its villi is made up of a network of loose mesenchyma. Its cells are stellate in shape and finely ...
The placenta functions as a fetomaternal organ with two components: the fetal placenta (chorion frondosum), which develops from ... Chorionic villi sprout from the chorion after their rapid proliferation in order to give a maximum area of contact with the ... chorionic villi: These sprout from the chorion in order to give a maximum area of contact with the maternal blood. ... chorion: The protective and nutritive membrane that attaches higher vertebrate fetuses to the uterus. ...
In insects the chorion is the outer shell of the insect egg. In vertebrates, the chorion is covered with ectoderm lined with ... Chorion, in reptiles, birds, and mammals, the outermost membrane around the embryo. It develops from an outer fold on the ... More About Chorion. 9 references found in Britannica articles. Assorted References. *relationship to allantois* In allantois ... Chorion, also called Serosa, in reptiles, birds, and mammals, the outermost membrane around the embryo. It develops from an ...
Chorion Frondosum Chorion facing the endometrium at the implantation site. Forms the chorionic villi ...
  • Briefly, the formation of the chorion starts by day 14 post conception (pc) when network of mesenchymal cells, derived from the embryonic disc [ 11 ], spread underneath the inner surface of the cytotrophoblast layer of the implanted blastocyst and form the chorionic sac. (pubmedcentralcanada.ca)
  • The amniotic cavity probably is formed by a split in the chorion just over the developing ectoderm and neural ridge. (glowm.com)