Preferred Label : blastoderm;
Uberon definition : A layer of cells formed at one pole of macrolecithal eggs such as the yolky egg of
birds. The yolk prevents the division from taking place through the egg, resulting
in meroblastic cleavage during the many cleavage divisions. At the animal pole (containing
less yolk than the vegetal pole), the zygote divides and subdivides, forming the blastoderm,
which gradually spreads around the yolk and forms the embryo. The blastoderm is composed
of two layers, the epiblast and the hypoblast, which enclose the fluid-filled blastocoel
cavity.;
Uberon related term : germinal membrane; membrana germinativa;
Origin ID : 0004750;
Automatic exact mappings (from CISMeF team)
- develops from
- existence ends during
- existence starts during
- has part
A layer of cells formed at one pole of macrolecithal eggs such as the yolky egg of
birds. The yolk prevents the division from taking place through the egg, resulting
in meroblastic cleavage during the many cleavage divisions. At the animal pole (containing
less yolk than the vegetal pole), the zygote divides and subdivides, forming the blastoderm,
which gradually spreads around the yolk and forms the embryo. The blastoderm is composed
of two layers, the epiblast and the hypoblast, which enclose the fluid-filled blastocoel
cavity.
