In amniote embryology, the hypoblast is one of two distinct layers arising from the inner cell mass in the mammalian blastocyst, or from the blastodisc...
13 KB (1,626 words) - 21:54, 3 May 2024
blastocyst, or from the blastula in reptiles and birds, the other layer is the hypoblast. It drives the embryo proper through its differentiation into the three...
10 KB (1,200 words) - 21:54, 3 May 2024
developed from the epiblast. The hypoblast is pushed down and forms the yolk sac (exocoelomic cavity) lining. Some hypoblast cells migrate along the inner...
11 KB (1,404 words) - 13:51, 29 August 2023
trophoblast. During formation of the primary yolk sac, some of the migrating hypoblast cells differentiate into mesenchymal cells that fill the space between...
7 KB (736 words) - 16:31, 14 February 2024
sac is a membranous sac attached to an embryo, formed by cells of the hypoblast layer of the bilaminar embryonic disc. This is alternatively called the...
8 KB (972 words) - 21:55, 3 May 2024
visceral endoderm (hypoblast). The hypoblast also plays an important role in the regulation of streak formation. Removal of the hypoblast in the chick results...
23 KB (2,803 words) - 21:33, 7 April 2024
short lived combination of hypoblast cells and extracellular matrix. At day 9-10 of embryonic development, cells from the hypoblast begin to migrate to the...
2 KB (193 words) - 00:31, 19 March 2023
developed from the epiblast. The hypoblast is pushed down and forms the yolk sac (exocoelomic cavity) lining. Some hypoblast cells migrate along the inner...
43 KB (5,261 words) - 10:52, 31 August 2024
the epiblast. The cells of the layers move between the epiblast and the hypoblast, and begin to spread laterally and cranially. The cells of the epiblast...
16 KB (1,871 words) - 15:24, 3 August 2024
The hypoblast forms the roof of the exocoelomic cavity and is continuous with the thin exocoelomic membrane. This membrane along with hypoblast forms...
10 KB (1,167 words) - 16:20, 17 August 2024
undergoes implantation. The inner cell mass initially has two layers: the hypoblast and epiblast. At the end of the second week, a primitive streak appears...
14 KB (1,365 words) - 23:04, 26 July 2024
primitive endoderm (or hypoblast) fate, while the remaining cells adopt a primitive ectoderm (or epiblast) fate. The hypoblast contributes to extraembryonic...
13 KB (1,750 words) - 15:10, 16 May 2024
hypoblast cells and the area opaca endoderm. As blastoderm cells migrate anteriorly they push primary hypoblast cells and form a secondary hypoblast known...
11 KB (1,429 words) - 05:17, 30 October 2023
imbedded in the uterine decidua Signaling pathway to inducing endoderm Hypoblast of primitive endoderm Ectoderm Germ layer Histogenesis Mesoderm Organogenesis...
4 KB (336 words) - 16:16, 2 May 2024
and they become the mesoderm and endoderm. As the hypoblast cells move inward future mesoderm (hypoblast cells) start to move vegetally and proliferate but...
11 KB (1,401 words) - 18:03, 17 March 2024
towards the side of the embryonic epiblast, and "ventral" more towards the hypoblast side, regardless of the organism's posture and physical orientation. Other...
5 KB (597 words) - 04:57, 28 April 2024
ectoderm and endoderm. The two layers are also sometimes referred to as the hypoblast and epiblast. Sponges do not go through the gastrula stage. Gastrulation...
38 KB (4,044 words) - 18:10, 14 March 2024
discoidal meroblastic cleavage. The blastoderm develops into the epiblast and hypoblast and it is between these layers that the blastocoel will form. The shape...
15 KB (1,645 words) - 02:48, 18 July 2024
sac is a membranous sac attached to an embryo, formed by cells of the hypoblast layer of the bilaminar embryonic disc. This is alternatively called the...
16 KB (1,893 words) - 02:46, 30 April 2024
germ cells use another path. PGCs come from the epiblast and move to the hypoblast to form the germinal crescent (anterior extraembryonic structure). The...
31 KB (4,039 words) - 12:27, 27 May 2024
inner cell mass (ICM) of a fertilized embryo segregates into two layers: hypoblast and epiblast. The epiblast cells are the functional progenitors of soma...
8 KB (961 words) - 21:57, 2 May 2024
more generally, the generation of new tissues at any stage of life. hypoblast in vitro fertilization (IVF) ingression inner cell mass invagination involution...
17 KB (1,491 words) - 17:02, 25 November 2023
an external epiblast layer (the primitive ectoderm), and an internal hypoblast layer (primitive endoderm). This gives the early bilaminar disc. In the...
3 KB (335 words) - 16:05, 31 August 2024
that eventually form the pharynx. Gastrulation ends when epiboly of the hypoblasts closes the blastopore. Under environmental conditions favourable for reproduction...
92 KB (10,532 words) - 17:39, 1 August 2024
function leads to a range of developmental defects. FGFs secreted by hypoblasts during avian gastrulation play a role in stimulating a Wnt signaling pathway...
25 KB (3,124 words) - 21:38, 18 August 2024
endodermal cells migrate anteriorly and eventually displace the hypoblast cells, causing the hypoblast cells to be confined to a region in the anterior portion...
11 KB (1,436 words) - 12:50, 29 July 2024
specification of the inner cell mass results in the formation of the hypoblast and epiblast. Later on in postimplantation development, the anterior-posterior...
45 KB (4,513 words) - 01:22, 22 June 2024
Top expressed in hypoblast suprachiasmatic nucleus connecting tubule mesoderm Mesorchium intermediate mesoderm paramesonephric duct lobe of cerebellum...
10 KB (1,283 words) - 04:26, 27 January 2024
anterior/posterior patterning of the embryo requires signals like cerberus from the hypoblast and the spatial regulation of retinoic acid accumulation to activate the...
33 KB (5,170 words) - 20:53, 16 September 2024
Top expressed in granulocyte embryo hypoblast embryonic organizer red nucleus endoderm notochord spermatocyte mesoderm spinal ganglia...
4 KB (448 words) - 06:52, 22 December 2023