Stage in embryonic development in which germ layers form
Gastrulation
Gastrulation occurs when a blastula, made up of one layer, folds inward and enlarges to create a gastrula. This diagram is color-coded: ectoderm, blue; endoderm, green; blastocoel (the yolk sac), yellow; and archenteron (the primary gut), purple.
Identifiers
MeSH
D054262
Anatomical terminology
[edit on Wikidata]
Gastrulation is the stage in the early embryonic development of most animals, during which the blastula (a single-layered hollow sphere of cells), or in mammals the blastocyst, is reorganized into a two-layered or three-layered embryo known as the gastrula.[1] Before gastrulation, the embryo is a continuous epithelial sheet of cells; by the end of gastrulation, the embryo has begun differentiation to establish distinct cell lineages, set up the basic axes of the body (e.g. dorsal–ventral, anterior–posterior), and internalized one or more cell types including the prospective gut.[2]
^Urry, Lisa (2016). Campbell Biology (11th ed.). Pearson. p. 1047. ISBN 978-0134093413.
^Gilbert, Scott F.; Michael J. F. Barresi (2016). Developmental biology (Eleventh ed.). Sunderland, Massachusetts: Sinauer. ISBN 978-1-60535-470-5. OCLC 945169933.
Gastrulation is the stage in the early embryonic development of most animals, during which the blastula (a single-layered hollow sphere of cells), or in...
the three primary germ layers, ectoderm, mesoderm and endoderm, during gastrulation. The amniotic ectoderm and extraembryonic mesoderm also originate from...
primitive streak establishes bilateral symmetry, determines the site of gastrulation, and initiates germ layer formation. To form the primitive streak, mesenchymal...
starts at the end of gastrulation and continues until birth. During organogenesis, the three germ layers formed from gastrulation (the ectoderm, endoderm...
continue its development through the next stages of gastrulation, neurulation, and organogenesis. Gastrulation is the formation of the three germ layers that...
mesoderm is the middle layer of the three germ layers that develops during gastrulation in the very early development of the embryo of most animals. The outer...
implants in the uterus. Embryogenesis continues with the next stage of gastrulation, when the three germ layers of the embryo form in a process called histogenesis...
Meckel's diverticulum. In the third week, gastrulation begins with the formation of the primitive streak. Gastrulation occurs when pluripotent stem cells differentiate...
development of the embryo. Cell movements during amphibian gastrulation In frog embryos, gastrulation initiates at the site identified as the gray crescent...
developmental biology, invagination is a mechanism that takes place during gastrulation. This mechanism or cell movement happens mostly in the vegetal pole....
blastocoel appears to serve two functions: it permits cell migration during gastrulation, and it prevents cells beneath it from interacting prematurely with cells...
internal cavity of the primitive gastrointestinal tract that forms during gastrulation in a developing animal embryo. It develops into the endoderm and mesoderm...
hollow ball of cells, a blastula. This early embryonic form undergoes gastrulation, forming a gastrula with either two or three layers (the germ layers)...
wall where it will undergo further developmental processes, including gastrulation. Embedding of the blastocyst into the endometrium requires that it hatches...
of an organism happens through fertilization, cleavage, blastulation, gastrulation, organogenesis, and metamorphosis into an adult. Each species of animal...
embryo itself, forming the three primary germ layers and participating in gastrulation. The vegetal pole contains large yolky cells that divide very slowly...
describes one of the five major types of cell movements that occur in the gastrulation stage of embryonic development of some organisms. Epiboly is the spreading...
sac producing a cellular blastoderm. Like other triploblastic metazoa, gastrulation leads to the formation of three germ layers: the endoderm, mesoderm,...
works as the signaling molecule for early embryonic development and gastrulation. Following the formation of the primitive node, secretion of Nodal induces...
Maza, Itay; Novershtern, Noa; Hanna, Jacob H. (1 September 2022). "Post-gastrulation synthetic embryos generated ex utero from mouse naive ESCs". Cell. 185...
first be observed in amphibians and fish during the later stages of gastrulation. At the start of this process, the developing embryo has divided into...
that makes up the blastula. It encloses the fluid filled blastocoel. Gastrulation follows blastoderm formation, where the tips of the blastoderm begins...
meaning a blastula without a clear central cavity. Elysia chlorotica gastrulation is by epiboly: the ectoderm spreads to envelope the mesoderm and endoderm...
(middle) and [laevis]x tropicalis cybrid (bottom) embryos cleave and begin gastrulation synchronously, about 50 minutes after diploid laevis x laevis (top) embryos...
stages of mid-gastrulation. The mouse allantois appears before the first somite pair as well; however, it occurs shortly after gastrulation. In both pigs...
1976. Snails are protostomes. That means during development, in the gastrulation phase, the blastopore forms the mouth first. Cleavage in snails is spiral...
amphibian gastrulation, the blastocoel is displaced by the formation of the archenteron, during mid-gastrulation. At the end of gastrulation, the blastocoel...
it can implant in the endometrial lining of the uterus and begin the gastrulation stage of embryonic development. The human zygote has been genetically...
The primitive node (or primitive knot) is the organizer for gastrulation in most amniote embryos. In birds it is known as Hensen's node, and in amphibians...
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