hypoblast

/hahy-puh-blast/US // ˈhaɪ pəˌblæst //UK // (ˈhaɪpəˌblæst) //

低细胞,低端细胞,低细胞的人,低细胞的

Definitions

n.名词 noun

1
Embryology.
- : the endoderm.
- : the cells entering into the inner layer of a young gastrula, capable of becoming endoderm and, to a certain extent, mesoderm.

To form the hypoblast a certain number of the cells of the lower layer begin to undergo remarkable changes.
It occurs by a direct conversion, cell for cell, of the white yolk spheres into hypoblast cells.
The growth of the hypoblast takes place in a very different way.
I have already spoken of the gradation of the hypoblast at the edge of the blastoderm into white yolk.
The mesoblast cells are in contact with both hypoblast and epiblast, and appear to be fused with the latter.