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...
38 KB (4,044 words) - 18:10, 14 March 2024
continue its development through the next stages of gastrulation, neurulation, and organogenesis. Gastrulation is the formation of the three germ layers that...
31 KB (3,290 words) - 21:27, 5 August 2024
the three primary germ layers, ectoderm, mesoderm and endoderm, during gastrulation. The amniotic ectoderm and extraembryonic mesoderm also originate from...
10 KB (1,200 words) - 21:54, 3 May 2024
internal cavity of the primitive gastrointestinal tract that forms during gastrulation in a developing animal embryo. It develops into the endoderm and mesoderm...
2 KB (263 words) - 18:36, 12 February 2024
Human embryonic development (section Gastrulation)
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...
43 KB (5,259 words) - 16:16, 15 August 2024
Germ layer (category Gastrulation)
hollow ball of cells, a blastula. This early embryonic form undergoes gastrulation, forming a gastrula with either two or three layers (the germ layers)...
14 KB (1,365 words) - 23:04, 26 July 2024
primitive streak establishes bilateral symmetry, determines the site of gastrulation, and initiates germ layer formation. To form the primitive streak, mesenchymal...
23 KB (2,803 words) - 21:33, 7 April 2024
Meckel's diverticulum. In the third week, gastrulation begins with the formation of the primitive streak. Gastrulation occurs when pluripotent stem cells differentiate...
11 KB (1,404 words) - 13:51, 29 August 2023
development of the embryo. Cell movements during amphibian gastrulation In frog embryos, gastrulation initiates at the site identified as the gray crescent...
6 KB (833 words) - 15:52, 13 August 2024
Ontogeny (section Gastrulation)
of an organism happens through fertilization, cleavage, blastulation, gastrulation, organogenesis, and metamorphosis into an adult. Each species of animal...
29 KB (3,246 words) - 22:22, 14 February 2024
developmental biology, invagination is a mechanism that takes place during gastrulation. This mechanism or cell movement happens mostly in the vegetal pole....
5 KB (574 words) - 17:19, 12 July 2024
Mesoderm (category Gastrulation)
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...
16 KB (1,871 words) - 15:24, 3 August 2024
starts at the end of gastrulation and continues until birth. During organogenesis, the three germ layers formed from gastrulation (the ectoderm, endoderm...
7 KB (792 words) - 16:40, 18 May 2024
Maza, Itay; Novershtern, Noa; Hanna, Jacob H. (1 September 2022). "Post-gastrulation synthetic embryos generated ex utero from mouse naive ESCs". Cell. 185...
20 KB (1,928 words) - 06:18, 13 May 2024
sac producing a cellular blastoderm. Like other triploblastic metazoa, gastrulation leads to the formation of three germ layers: the endoderm, mesoderm,...
21 KB (2,688 words) - 03:15, 29 June 2024
(middle) and [laevis]x tropicalis cybrid (bottom) embryos cleave and begin gastrulation synchronously, about 50 minutes after diploid laevis x laevis (top) embryos...
4 KB (448 words) - 07:34, 19 April 2024
Elysia chlorotica (section Gastrulation)
meaning a blastula without a clear central cavity. Elysia chlorotica gastrulation is by epiboly: the ectoderm spreads to envelope the mesoderm and endoderm...
19 KB (2,187 words) - 08:32, 26 June 2024
Ectoderm (category Gastrulation)
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...
16 KB (1,844 words) - 23:54, 18 May 2024
wall where it will undergo further developmental processes, including gastrulation. Embedding of the blastocyst into the endometrium requires that it hatches...
29 KB (3,162 words) - 03:36, 19 June 2024
Cadherin-1 (section Cell sorting during gastrulation)
could be a relevant player within germ-layer organization during gastrulation. Gastrulation is a fundamental phase of vertebrate development in which three...
55 KB (6,434 words) - 22:24, 2 May 2024
Fetal membranes illustrated at week 3 following gastrulation...
16 KB (1,893 words) - 02:46, 30 April 2024
cells divide with spiral cleavage instead of radial cleavage. During gastrulation, the first opening becomes the embryos' mouth while the anus is formed...
12 KB (916 words) - 19:35, 4 August 2024
blastocoel appears to serve two functions: it permits cell migration during gastrulation, and it prevents cells beneath it from interacting prematurely with cells...
17 KB (1,491 words) - 17:02, 25 November 2023
Beginning of human personhood (section Gastrulation)
have proposed that personhood begins at such events as fertilization, gastrulation, the acquisition of an EEG pattern, and birth. Other scientists claim...
62 KB (7,311 words) - 21:44, 17 August 2024
1976. Snails are protostomes. That means during development, in the gastrulation phase, the blastopore forms the mouth first. Cleavage in snails is spiral...
21 KB (2,471 words) - 09:04, 17 June 2024
usually nearing completion by the 4th week of development. Due to abnormal gastrulation, the mesoderm migration is disturbed. This disturbance results in symptoms...
10 KB (1,132 words) - 02:08, 18 July 2024
form a hollow sphere (blastula) and then a depression forms at one end (gastrulation) and eventually becomes the digestive cavity. However, in cnidarians...
81 KB (8,949 words) - 01:32, 17 August 2024
and ectoderm are germ layers that develop in a process called gastrulation. Gastrulation occurs early in human development. The gastrointestinal tract...
48 KB (5,657 words) - 02:33, 10 July 2024
amphibian gastrulation, the blastocoel is displaced by the formation of the archenteron, during mid-gastrulation. At the end of gastrulation, the blastocoel...
15 KB (1,645 words) - 02:48, 18 July 2024
single epithelial layer enveloping the blastocoel. The embryo then begins gastrulation, a multipart process which dramatically rearranges its structure by invagination...
74 KB (7,699 words) - 18:30, 13 August 2024