blastoderm

Term ID

UBERON:0004750

Synonyms

• germinal membrane
• membrana germinativa

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. http://en.wikipedia.org/wiki/Blastoderm

References

• AAO:0000042
• BTO:0000126
• MESH:A16.254.085.067
• TAO:0001176
• ZFA:0001176
• http://en.wikipedia.org/wiki/Blastoderm

Ontology

Uberon Ontology