• Four main waves of miRNA expression were recognized (with most miRNA changes occurring during the embryonic stages): the first from day 0 to day 1 of embryogenesis, the second during mid-embryogenesis (days 0-6), the third (with an acute expression peak) on day 2 of embryonic development, and the fourth during post-embryonic development. (biomedcentral.com)
  • Haeckel produced these artistic drawings, supposedly based on his own specimens 1 of different embryos, claiming that all of them pass through stages reminiscent of their evolutionary ancestors. (answersingenesis.org)
  • Such human fully integrated and complete SEMs recapitulate the organization of nearly all known lineages and compartments of post-implantation human embryos, including the epiblast, the hypoblast, the extra-embryonic mesoderm and the trophoblast layer surrounding the latter compartments. (nature.com)
  • Although it is possible to culture structures derived from human blastocysts ex vivo, these cultures do not recapitulate the events and structural organization of the in vivo embryos 6 ( Supplementary Information ). (nature.com)
  • It is therefore likely that miRNAs influence the mechanisms that specify the germ-band type and body structure, which is related to the metamorphosis mode, in insect embryos. (biomedcentral.com)
  • The issue of research involving stem cells derived from human embryos is increasingly the subject of a national debate and dinner table discussions," said President George W. Bush in a 2001 speech announcing his policy on embryonic stem cell research. (erlc.com)
  • Where do the embryos for embryonic stem cells come from? (erlc.com)
  • Currently, all human embryonic stem cell lines in use today were created from embryos generated by IVF. (erlc.com)
  • When two embryos are correctly joined before the 32-cell stage, the embryo will develop normally and exhibit a mosaic pattern of cells as an adult. (asu.edu)
  • Studying the early stages of embryo development has always been ethically challenging because it becomes difficult to observe embryos once they have implanted in the uterus. (iasgyan.in)
  • These laboratory-grown embryo-like models provide an ethically responsible means of studying the initial stages of embryonic development, eliminating the need for donated embryos or in-vivo studies. (iasgyan.in)
  • The southern ground cricket, Allonemobius socius (Scudder), is an ideal animal for studying mechanisms that regulate embryonic diapause because adult females can produce either diapause or non-diapause embryos. (biologists.com)
  • At this download the stage embryo and blood-vessel embryos note almost rectangular. (need4speed.com)
  • In the new report, the team has refined their reprogramming technique to produce embryo-like structures that are more similar to real embryos. (sciencedaily.com)
  • When they examined small clusters of cells a few days before they matured into the blastocyst-like structures, they found that the cells contained gene expression for totipotency that are found in two-cell embryos. (sciencedaily.com)
  • Cells within the precursors resembled embryos at an earlier stage before compaction, which was good evidence that the precursor clusters might include totipotent cells. (sciencedaily.com)
  • The implanted structures often grew and produced many types of cells that resembled those naturally found in early developing embryos. (sciencedaily.com)
  • The carapace length (CL) of ovigerous females was measured and the development stage of their ovaries and embryos were analyzed. (scielo.br)
  • Females with rudimentary ovaries predominantly showed embryos in stage I (early development) and females with developed ovaries only showed embryos in stage II (final development), showing synchrony between the development of both, thus supporting the hypothesis of a continuous reproductive cycle for N. schmitti in the region. (scielo.br)
  • Ontogeny means development from the earliest stages to maturity. (answersingenesis.org)
  • Scientists have managed to create synthetic human embryo models without using egg, sperm or womb, in a feat that could impact research on fertility, tissue growth and drug testing, as well as improve science's understanding of the first weeks of embryonic development. (israel21c.org)
  • These embryo-like structures went on to develop for eight days outside the womb, reaching a stage equivalent to day 14 in natural human embryonic development. (israel21c.org)
  • The embryo is the earliest stage of development and remains within the egg or reproductive organs of the mother until hatching or birth. (microbiologynote.com)
  • The study of embryo development is known as embryology, which is a branch of biology dedicated to understanding the processes and stages of embryonic growth. (microbiologynote.com)
  • miRNAs follow well-defined patterns of expression over hemimetabolan ontogeny, patterns that are more diverse during embryonic development than during the nymphal stages. (biomedcentral.com)
  • The results suggest that miRNAs play important roles in the developmental transitions between the embryonic stages of development (starting with maternal loading), during which they might influence the germ-band type and metamorphosis mode. (biomedcentral.com)
  • All specialized cells arise originally from stem cells, and ultimately form a small number of embryonic cells that appear during the first few days of development. (erlc.com)
  • Embryo" is the term for humans and other mammals in the stage of development between fertilization and the end of the eighth week of gestation, whereupon the being is referred to as a fetus until the time of birth. (erlc.com)
  • The process involved introducing specific chemicals that directed the stem cells to differentiate and form an embryo-like structure, mimicking the early stages of embryonic development. (iasgyan.in)
  • Chemical cues were introduced into the laboratory environment to provide the necessary signals and instructions for the stem cells to differentiate into the diverse cell types required for embryonic development. (iasgyan.in)
  • This process led to the spontaneous assembly of a portion of these cells into an embryo-like structure, which underwent differentiation to represent various components of an embryo, including fetal cells, cells providing nutrients to the fetus, cells directing body development, and cells forming supporting structures like the placenta and umbilical cord. (iasgyan.in)
  • Research into early embryonic development holds immense importance as the majority of miscarriages and birth defects occur during these crucial early stages. (iasgyan.in)
  • By understanding the genetic and epigenetic factors that influence embryonic development, scientists aim to uncover the causes of these issues and potentially develop more effective treatments. (iasgyan.in)
  • This research could advance our understanding of embryonic development and potentially contribute to medical advancements, particularly in the field of genetic medicine. (iasgyan.in)
  • Certain periods during embryonic development are particularly critical for the proper formation of organs and body structures. (iasgyan.in)
  • By studying the characteristics and development of chordates and comparing them to non-chordates, scientists can gain insights into the origins and diversification of various animal lineages. (thenoveldifference.com)
  • these three areas differentiate early in embryonic development and later give rise to the structures listed in black. (upei.ca)
  • These three areas further subdivide into the telencephalon, diencephalon, mesencephalon, metencephalon, and myelencephalon at a later stage of development. (upei.ca)
  • This embryo emphasis turned developing somitomeres in the multipotent and indirect session of their challenges and first elongated eleven vieles by circulating the own measurement of team to hear their epithelial government to represent nervous development plate and structure embryo has during the Olympics. (need4speed.com)
  • NASA launched occipital, able evil branch borders into the AGATE Alliance to refine their hierarchical page of diesem with the settings vesicle vorschlagen of NASA Langley somites and the base pilot of embryonic yellow session development cookies. (need4speed.com)
  • EMT is usually a fundamental process in normal embryonic development, particularly during formation of mesoderm, neural crest formation and heart valve development [10]. (bso14.org)
  • Normal Mammary Gland Development The breast gland, somewhat uniquely, evolves in different stages separated in time often by years or decades. (bso14.org)
  • In early embryonic mammary gland development, Isatoribine the formation of the mammary epithelial placodes in the skin is a critical event. (bso14.org)
  • The embryonic development and colour changes of eggs during incubation were documented. (researchgate.net)
  • We studied neurogenesis during embryonic development of Pseudopallene sp. (biomedcentral.com)
  • The basic architecture of the arthropod central nervous system is most evident during embryonic development. (biomedcentral.com)
  • Development of a single-celled zygote into an adult involves a series of steps or stages resulting in a gradual increase in the complexity of structure. (biologydiscussion.com)
  • The stages of embryonic development differ in various chordates, yet the chief phases are basically similar in all. (biologydiscussion.com)
  • The yolk also influences on the pattern of cleavage, on the morphogenetic movements of the blastomeres during gastrulation and on the type of development, i.e., indirect with larval forms or direct with juvenile stages. (biologydiscussion.com)
  • In some lower animals the amount of yolk is less in egg, so that the embryo hatches in earlier stages of development, called a larva. (biologydiscussion.com)
  • William Harvey (1578- 1657) and Marcello Malpighi (1628-1694) contributed information on the various stages of the development of chick on the basis of their studies with the help of simple lens. (biologydiscussion.com)
  • He suggested that during embryonic development the organs formed successively in an epigenetic manner. (biologydiscussion.com)
  • Recall that animals that possess bilateral symmetry can be divided into two groups-protostomes and deuterostomes-based on their patterns of embryonic development. (openstax.org)
  • Animals in the phylum Chordata share four key features that appear at some stage during their development: a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail ( Figure 29.3 ). (openstax.org)
  • In some groups, some of these are present only during embryonic development. (openstax.org)
  • In vertebrates, the notochord is present during embryonic development, at which time it induces the development of the neural tube and serves as a support for the developing embryonic body. (openstax.org)
  • Studying the embryonic development of various species helps us understand the phylogenetic relationships between different animals . (studyread.com)
  • The EYA1 protein interacts with several other proteins, including SIX1 and SIX5, to regulate the activity of genes involved in many aspects of embryonic development. (medlineplus.gov)
  • The resulting genetic changes affect the development of organs and tissues before birth, which leads to the characteristic features of BOR/BO syndrome. (medlineplus.gov)
  • Detailed site-specific glycan analysis of a wide variety of SARS-CoV-2 variants provides useful information toward the understanding of the role of protein glycosylation on viral protein structure and function and development of effective vaccines and therapeutics. (cdc.gov)
  • Child development is permeated by innumerable performance and mental health, ranging from reduced constraints, including genetic and organic factors related ability to perform routine daily activities in a satisfactory to individual characteristics of the unborn human being, and proper manner of each stage of development, up to broader factors such as environmental, cultural and to cases of bullying, violence, prejudice, among others. (bvsalud.org)
  • The animals belonging to all other phyla of the animal kingdom are often termed 'the non-chordates' or 'the invertebrates' since they have no notochord or backbone in their body structure. (ukessays.com)
  • The notochord is an elongated rod-like flexible structure extending the length of the body. (ukessays.com)
  • A critical distinction between chordates and non-chordates lies in their body structures - chordates have a spinal cord or backbone, whereas non-chordates lack it and contain notochord. (thenoveldifference.com)
  • The notochord is a flexible rod-like structure that serves to support vertebrate bodies while acting as its precursor. (thenoveldifference.com)
  • The chordates are named for the notochord , which is a flexible, rod-shaped structure that is found in the embryonic stage of all chordates and in the adult stage of some chordate species. (openstax.org)
  • By means of immunofluorescence and BrdU birthdating experiments, we observed that this structure consists of neurons of all layers and generated at all stages of neurogenesis, with late-born neurons of upper-layer identity being the majority. (uni-muenchen.de)
  • Like in tetrapods, medial amygdaloid (MeA) nuclei are defined by the presence of substance P immunoreactive fibers and calretinin-positive neurons, whereas central amygdaloid (CeA) nuclei lack these characteristics. (frontiersin.org)
  • It is perhaps not surprising that the cerebellum's influence extends beyond that of movement and posture, given that it contains the greatest number of neurons of any structure in the brain. (upei.ca)
  • Neurons of the nasal epithelium and the vomeronasal organ were also shown to express Nph3 in embryonic stages. (uni-goettingen.de)
  • We demonstrated that Meis1 is a major regulator of sympathetic target-field innervation and that Meis1 deficient sympathetic neurons die by apoptosis from early embryonic stages to perinatal stages. (bvsalud.org)
  • A potentially pre-clinical aspect of this thesis is detailed in paper №4 where I describe a robust protocol for the generation of functional mesDA neurons from human embryonic stem cells that are functional in a rat model of PD. (lu.se)
  • A stem cell-derived human embryo model equivalent to a day-14 embryo has all the compartments that define this stage: the yolk sac (yellow) and the part that will become the embryo itself, topped by the amnion (blue) - all enveloped by cells that will become the placenta (pink). (israel21c.org)
  • Mouse naive embryonic stem cells have recently been shown to give rise to embryonic and extra-embryonic stem cells capable of self-assembling into post-gastrulation structured stem-cell-based embryo models with spatially organized morphogenesis (called SEMs) 3 . (nature.com)
  • Here we extend those findings to humans using only genetically unmodified human naive embryonic stem cells (cultured in human enhanced naive stem cell medium conditions) 4 . (nature.com)
  • Though not intended to be an exhaustive explanation of this important topic, we believe this will help to clarify and explain the questions most frequently asked about embryonic stem cell research. (erlc.com)
  • The term adult stem cells simply refers to any non-embryonic stem cell, whether taken from a fetus, a child or an adult. (erlc.com)
  • We discuss these properties with examples both from the hematopoietic and embryonic stem cell (ESC) systems. (lu.se)
  • Embryo-like models with spatially organized morphogenesis and structure of all defining embryonic and extra-embryonic tissues of the post-implantation human conceptus (that is, the embryonic disc, the bilaminar disc, the yolk sac, the chorionic sac and the surrounding trophoblast layer) remain lacking 1 , 2 . (nature.com)
  • Much of this process relies on the morphogenesis of the extra-embryonic tissues and the effect this has on the organization of embryonic cells. (nature.com)
  • Interestingly, bundles of aligned and uniformly spaced collagen fibrils were more prevalent in keratocytes in Y-27632-treated corneas, which is reminiscent of fibripositor-like structures that have been proposed as a mechanism of matrix deposition in embryonic connective tissues. (molvis.org)
  • A disease that causes tissues or organs to deteriorate in structure or function over time. (mayo.edu)
  • A team of researchers from Kumamoto University (Japan) generated sophisticated 3D kidney tissues in the lab using just cultured mouse embryonic stem (ES) cells. (mdforlives.com)
  • This gives us details of the structure and the characteristics of the cells and tissues that form the organ structure. (studyread.com)
  • Branchio-" refers to the second branchial arch, which is a structure in the developing embryo that gives rise to tissues in the front and side of the neck. (medlineplus.gov)
  • Somites are precursor populations of cells that give rise to important structures associated with the vertebrate body plan and will eventually differentiate into dermis, skeletal muscle, cartilage, tendons, and vertebrae. (asu.edu)
  • Characteristic of the vertebrate form, the human body has an internal skeleton that includes a backbone of vertebrae. (rincondelvago.com)
  • It can coexist with mature cystic teratomas and can constitute of a combination of both adult and embryonic tissue. (wikipedia.org)
  • The AJCC staging system, identical to the FIGO staging system, describes the extent of tumor (T), the presence of absences of metastases to lymph nodes (N), the presence or absence of distant metastases (M). An immature teratoma contains varying compositions of adult and embryonic tissue. (wikipedia.org)
  • The distinction between the hemimetabolan and holometabolan modes of metamorphosis is important: hemimetabolan species develop the basic adult body structure during embryogenesis, whereas holometabolans delay this until the pupal stage [ 18 , 19 ]. (biomedcentral.com)
  • Usually, it is very different in form and structure from the adult. (biologydiscussion.com)
  • Immature teratomas composed of embryonic endodermal derivatives are rare. (wikipedia.org)
  • It originates from the endodermal roof of the embryonic archenteron. (ukessays.com)
  • In all the chordates, at some stage of their life history, a series of paired lateral gill clefts or gill slits perforate through the pharyngeal wall of the gut behind the mouth. (ukessays.com)
  • Chordates are a phylum of animals that possess a distinct set of anatomical features at some stage in their life cycle. (thenoveldifference.com)
  • Non-chordates (also referred to as invertebrates) constitute an extremely diverse class of animals that do not share the distinguishing features characteristic of chordates. (thenoveldifference.com)
  • Non-chordates encompass a wide range of animal phyla, exhibiting diverse body plans, anatomical structures, and ecological roles. (thenoveldifference.com)
  • Chordates and non-chordates exhibit significant differences in their anatomical structures and physiological processes. (thenoveldifference.com)
  • Click for a video discussing the evolution of chordates and five characteristics that they share. (openstax.org)
  • Connecting microRNA genes to the core transcriptional regulatory circuitry of embryonic stem cells. (nature.com)
  • Here, we show that characteristic spatial expression profiles and levels of the Hox genes Antennapedia (Antp) and Ultrabithorax (Ubx) underlie the formation of two different flight organs in the fruit fly Drosophila melanogaster. (bvsalud.org)
  • They found that many genes related to the outer/inner cell fates of blastocysts were present in the induced structures, but at lower than natural levels, indicating that the new technique does not perfectly reproduce blastocysts. (sciencedaily.com)
  • These include embryonic disc and bilaminar disc formation, epiblast lumenogenesis, polarized amniogenesis, anterior-posterior symmetry breaking, primordial germ-cell specification, polarized yolk sac with visceral and parietal endoderm formation, extra-embryonic mesoderm expansion that defines a chorionic cavity and a connecting stalk, and a trophoblast-surrounding compartment demonstrating syncytium and lacunae formation. (nature.com)
  • The French flag model represents how embryonic cells receive and respond to genetic information and subsequently differentiate into patterns. (asu.edu)
  • Despite the severe cortical malformations at embryonic stages, the mice get born and reach the age of weaning at no apparent difference from the Mendelian rate. (uni-muenchen.de)
  • This study describes the prevalence, associated malformations, and maternal characteristics among cases with sirenomelia. (cdc.gov)
  • In mammals and other tetrapods, a multinuclear forebrain structure, called the amygdala, forms the neuroregulatory core essential for emotion, cognition, and social behavior. (frontiersin.org)
  • A multinuclear forebrain structure, the amygdala of mammals has been viewed as a requirement for sophisticated emotions, social behavior, and emotional sentience. (frontiersin.org)
  • We sequenced small RNA libraries representing 11 developmental stages of B. germanica ontogeny (with especial emphasis on embryogenesis) and the changes in miRNA expression were examined. (biomedcentral.com)
  • Table 2 lists developmental stages [Bearer 1995a, 1995b]. (cdc.gov)
  • Four developmental stages were described in males and females. (scielo.br)
  • Zygotic mutants develop to pupal stages, but do not eclose, whereas maternal mutants display severe defects in early embryonic patterning (Veraksa, 2002). (sdbonline.org)
  • Overexpression of DEAF-1 by using a maternal driver inhibits germ-band retraction and causes defects in dorsal closure, whereas overexpression at later stages causes cell death (Reed, 2008). (sdbonline.org)
  • Nevertheless, when transplanted to the womb of pseudo-pregnant mice, the blastocyst-like structures often induced changes to the uterus that are necessary for successful blastocyst implantation, including the integration of the maternal blood supply. (sciencedaily.com)
  • Courtship behaviour, captive breeding, embryonic and larval developments of Nemateleotris decora and its rearing with suitable live feed were described. (researchgate.net)
  • This research constructs an in vitro induction strategy for stromal progenitors (SPs) from mice PSCs by revealing the in vivo molecular characteristics of the renal stromal lineage at a single-cell resolution level. (mdforlives.com)
  • The study shows that the blastocyst-like structures very closely resemble actual blastocysts, and even induce proper changes in the uterus after being implanted in pseudo-pregnant mice. (sciencedaily.com)
  • The stage-specific embryonic antigen 4 (SSEA4) is com- isolate the NSCs from neonatal mice and rats (Campos monly used as a cell surface marker to identify the pluri- et al. (lu.se)
  • Immunohisto- have been used for positive selection of NSCs from em- chemistry on human embryonic central nervous system bryonic mice (Nagato et al. (lu.se)
  • Overall, the structure of the sperm is highly specialized for its function in fertilization. (microbiologynote.com)
  • These human complete SEMs demonstrated developmental growth dynamics that resemble key hallmarks of post-implantation stage embryogenesis up to 13-14 days after fertilization (Carnegie stage 6a). (nature.com)
  • A human embryo is the earliest developmental stage of a human organism following fertilization (the union of a sperm cell and an egg cell). (iasgyan.in)
  • Some anatomical structures in the developing embryo disappear completely or regress substantially once they serve their developmental purpose, remaining only as scar-like vestiges (literally, "footprints") in the mature human. (answersingenesis.org)
  • While previous studies of cellular aggregates derived from human stem cells could not be considered accurate human embryo models because they lacked many of the defining characteristics of a post-implementation embryo, the Weizmann synthetic embryo models had all the structures characteristic of this stage, such as the placenta and yolk sac. (israel21c.org)
  • The researchers reprogrammed the pluripotent stem cells to an earlier (naïve) stage corresponding to day 7 of a natural human embryo, around the time it implants itself in the womb. (israel21c.org)
  • The 14-day human embryo model under the microscope reveals the hormone used in pregnancy tests (green) and the outer layer slated to become the placenta (pink), which contains characteristic cavities, called lacunae. (israel21c.org)
  • Typical of mammalian structure, the human body shows such characteristics as hair, mammary glands, and highly developed sense organs. (rincondelvago.com)
  • It is DNA, passed from parents to offspring, that dictates the inherited characteristics of each human being. (rincondelvago.com)
  • by The download Führung: Auf die letzten Meter of human characteristics with control in two generations of the closing and design, general to exacte Berlins in these friends. (need4speed.com)
  • 2005). Notch1 and syndecan-1 potent human embryonic stem (ES) cells. (lu.se)
  • All three groups were mixed together and formed clumps, about 1 percent of which self-organized into complete embryo-like structures. (israel21c.org)
  • Organs are made up of parenchyma and stroma, with the latter coordinating the formation of organotypic structures. (mdforlives.com)
  • Only gradually did these "globules" organise into rudiments (germ layers) which, in turn, took on the characteristics of the various organs of the embryo. (biologydiscussion.com)
  • Anatomical structures of great complexity seem to begin as much simpler forms. (answersingenesis.org)
  • The parietal lobe houses the somatosensory (body sensations) cortex and structures involved in visual attention, as well as multisensory convergence zones. (upei.ca)
  • Tumors may also present embryonic components such as immature cartilage and skeletal muscle of mesodermal origin. (wikipedia.org)
  • Finally, EMT has been closely linked with breast cancer Isatoribine progression where tumors of certain sub-groups have been demonstrated to be driven by malignancy stem cells that have acquired mesenchymal characteristics that greatly enhances their tumorigenicity and metastatic potential [9, 11, 12]. (bso14.org)
  • Unlike a mature cystic teratoma, an immature teratoma contains immature or embryonic structures. (wikipedia.org)
  • At CT and MRI, an immature teratoma possesses characteristic appearance. (wikipedia.org)
  • Laproscopy is often suggested as an alternative to surgically stage patients with immature teratoma. (wikipedia.org)
  • The most common embryonic component identified in immature teratomas is the neuroectoderm. (wikipedia.org)
  • Gradual disappearance of bile duct profiles associated with increased periportal fibrosis results from a progressive destructive cholangiopathy that involves the immature bile duct structures. (medscape.com)
  • Anatomy is the science that deals with studying the internal structure of a body. (studyread.com)
  • Anatomy is one of the foundation sciences for studying the art of medicine, and it is necessary to understand anatomy so that one can have a spatial idea of the structures inside the body. (studyread.com)
  • After an egg is fertilized, it begins to divide and passes through several stages. (sciencedaily.com)
  • This lead us to the conclusion, that the neuronal misplacement is a secondary effect, which occurs due to the observed disruption of the radial glial structure. (uni-muenchen.de)
  • These cells possess the remarkable ability to transform into different cell types, and in this case, they were programmed to simulate the characteristics of early-stage embryonic cells. (iasgyan.in)
  • Thus, the study explains how the zebrafish amygdala and the complexly everted telencephalon topologically relate to the corresponding structures in mammals indicating that an elaborate amygdala ground plan evolved early in vertebrates, in a common ancestor of teleosts and tetrapods. (frontiersin.org)
  • Based on molecular and evolutionary-developmental characteristics, the study identifies the elaborate amygdala ground plan in zebrafish and stresses the evolution of a complex emotional system in early vertebrates. (frontiersin.org)
  • Early-stage kidney disease normally has no symptoms, and many people living with it are not even aware of having it until it is too late. (mdforlives.com)
  • In doing so, they noticed structures that looked like early embryo blastocysts. (sciencedaily.com)
  • Inhalation anthrax has three clinical stages: early-prodromal, intermediate-progressive, and late-fulminant. (cdc.gov)
  • This hierarchical classification was based on the similarities and dissimilarities in the characteristics of the living organisms. (vdocuments.net)
  • Organisms having similar characteristics were placed in a similar category. (vdocuments.net)
  • Next the group investigated how genetically and functionally similar their blastocyst-like structures were to actual blastocysts. (sciencedaily.com)
  • In recent research, scientists used mouse embryonic stem cells to generate sophisticated kidney tissue. (mdforlives.com)
  • Hagedorn and her group also traveled to Belize in 2011 to bank embryonic stem cells from the endangered species Acropora cervicornis . (si.edu)
  • He forwarded the germ layer theory which states that "various structures of the body arise from the same germ layers in different species of animals" . (biologydiscussion.com)
  • Even among the same species ( Homo sapiens ), one can find many differences in body structure. (studyread.com)
  • The environmental conditions in this upwelling region may have induced this population of A. spinimanus to show different characteristics and behaviors from other populations on the Brazilian coast, since alterations linked to the periods of reproduction and recruitment, as well as the population structure and distribution, may reveal different survival strategies of the species. (scielo.br)
  • A three-stage continuum in the Center for Regenerative Biotherapeutics that represents basic science research (discovery), the movement of those laboratory findings into clinical trials and testing (translation), and their introduction into patient care (application). (mayo.edu)
  • In the slide of a testis, we can observe the different stages of maturation of the sperm. (studyread.com)
  • Though several studies have shown that size and stage of the primary tumor are related to survival, the grade of the tumor is the best determinant of prognosis prior to peritoneal spread. (wikipedia.org)
  • If a Wilms tumor is suspected or if the primary tumor is histologically confirmed, it should be staged by using CT or MRI. (medscape.com)
  • Investigating the cellular architecture of the developing cortex, we observed a loss of the radial orientation of radial glial cells, likely due to the disruption of the apical band of adherens junctions, which is the first effect observed after loss of the protein, and the consequent formation of rosette like structures in the brain parenchyma. (uni-muenchen.de)
  • Stem cells differ, though, in that they are relatively undifferentiated and unspecialized-they have not yet obtained a special structure and function. (erlc.com)
  • Stem cells have two unique characteristics: (1) an almost unlimited capacity for self-renewal (they can theoretically divide without limit to replenish other cells for as long as the person is alive) and (2) they retain the potential to produce differentiated and specialized cell types. (erlc.com)
  • What are embryonic stem cells? (erlc.com)
  • Embryonic stem cells (ESCs) are stem cells that have been taken from the inner cell mass of a blastocyst, an embryo of about 150 cells that has not yet implanted into a woman's uterus. (erlc.com)
  • Created by Lewis Wolpert in the late 1960s, the model uses the French tricolor flag as visual representation to explain how embryonic cells can interpret genetic code to create the same pattern even when certain pieces of the embryo are removed. (asu.edu)
  • For information on the structure and function of the cells that constitute the body, see Cells. (rincondelvago.com)
  • A highly localized Nph3 expression pattern was observed with the most characteristic area of expression being the deep layers of the neocortex, where a band of expressing cells persisted throughout ontogeny and adulthood. (uni-goettingen.de)
  • The cells can achieve this using unique Isatoribine mechanisms including collective migration [7, 8] or epithelial to mesenchymal transition (EMT) where leading cells at the tip of the branching structures acquire mesenchymal characteristics that facilitate migration into the surrounding stroma [9]. (bso14.org)
  • When induced SPs are combined with two differentiating parenchymal progenitors (nephron progenitors and ureteric buds), the completely PSC-derived organoids replicate the complex kidney structure, with multiple types of stromal cells seen along developing nephrons and branching ureteric buds. (mdforlives.com)
  • Researchers have generated 3D blastocyst-like structures from stem cells. (sciencedaily.com)
  • An international collaboration of researchers from the RIKEN Center for Biosystems Dynamics Research (BDR) in Japan and Gladstone Institutes in the USA have generated 3D blastocyst-like structures from stem cells. (sciencedaily.com)
  • Cells in the two-cell stage are totipotent--they can become any type of cell. (sciencedaily.com)
  • A further test comparing the blastocyst-like structures with their precursors showed that cells in the matured structures were bound close together--a hallmark of blastocyst formation and polarization that is the result of a process called compaction. (sciencedaily.com)
  • cells or their nuclei) lacking in any arrangement, i.e., these globules do not reveal any resemblance with the form or structure of the future embryo. (biologydiscussion.com)
  • We examined the changes in miRNA expression over the ontogeny of the German cockroach Blattella germanica , using 11 small RNA libraries prepared and sequenced in our laboratory, representing developmentally important stages. (biomedcentral.com)
  • This is due to the nervous system's conserved basic architecture on the one hand, and on the other its lineage-specific structural diversity, which facilitates the specific comparison and possible homologization of neural structures and their respective sub-parts [ 3 ]. (biomedcentral.com)
  • According to the World Health Organization's histopathologic classification, gastric adenomyoma is a benign tumor of the stomach characterized by a smooth muscle stroma in the glandular structures of the cuboidal epithelium or columnar epithelium [ 1 ]. (biomedcentral.com)
  • Long germ-band insects, such as the fruit fly Drosophila melanogaster , form most of their segments simultaneously at the blastoderm stage, i.e., before gastrulation. (biomedcentral.com)
  • Deformed epidermal autoregulatory factor-1 (DEAF-1) is a transcription factor that was originally shown to bind the autoregulatory enhancer of the Deformed ( Dfd ) Hox gene, which is activated in embryonic head segments of Drosophila (Gross, 1996). (sdbonline.org)
  • To date, CSS coral researchers have produced coral from frozen banks that are setting the stage for exciting advancements for "assisted evolution" that will produce robust hybrids more resistant to warming and acidification. (si.edu)
  • An example would be the median umbilical ligament, a fibrous remnant between the top of the bladder and the "belly-button," marking a structure important during the formation of the urinary bladder. (answersingenesis.org)
  • In the histodifferentiation process, these structures result in the formation of enamel, dentine and cementum 1 . (scielo.edu.uy)
  • They consist of the cerebral cortex and accompanying white matter ("cerebrum" in Latin) as well as the subcortical structures of the basal ganglia, amygdala, and hippocampal formation. (upei.ca)
  • It helps us understand the formation and importance of various structures within the body. (studyread.com)
  • The longer the patient survives, the less characteristic the renal pathology becomes. (medscape.com)
  • In some cases, end-stage renal disease (ESRD) develops later in life. (medlineplus.gov)
  • The cell two vessels afford instructive stage #15 or imperfectly studied to present. (ontopofmusic.com)
  • Molecular characteristics such as the distribution of substance P and the calcium-binding proteins parvalbumin (PV) and calretinin (CR) indicate, that the zebrafish extended centromedial (autonomic and reproductive) amygdala is predominantly located in the GABAergic and isl1 -negative territory. (frontiersin.org)
  • Ovarian cancer is staged using the FIGO staging system and uses information obtained after surgery, which can include a total abdominal hysterectomy via midline laparotomy, unilateral (or bilateral) salpingo-oophorectomy, pelvic (peritoneal) washings, assessment of retroperitoneal lymph nodes and/or appendectomy. (wikipedia.org)
  • Hindgut structures (distal colon and genitourinary tract) cause lower abdominal pain. (msdmanuals.com)
  • Understanding these differences can provide valuable insights into the adaptations and functional characteristics unique to each group. (thenoveldifference.com)
  • In this radical paradigm, thirteen telencephalic territories constitute the zebrafish amygdaloid complex and each territory is distinguished by conserved molecular properties and structure-functional relationships with other amygdaloid structures. (frontiersin.org)
  • Those structures will later form the vertebral column. (asu.edu)
  • Dental anomalies occur between the sixth and eighth weeks of intrauterine life, the stage during which embryonic structures such as the dental sac, dental papilla and tooth undergo conversion. (scielo.edu.uy)
  • Beginning with the appearance of secondary sexual characteristics to achievement of full maturity (usually 12 to 18 years for physical characteristics. (cdc.gov)
  • Abstract This study investigated the temporal abundance, periods of reproduction and recruitment, gonad sexual maturity, and population structure of the swimming crab Achelous spinimanus (Latreille, 1819) in Macaé, a region of the Brazilian coast affected by upwelling events. (scielo.br)
  • This is the study of external features and measurements of structures of different races and groups of people, with the study of prehistoric remains. (studyread.com)