Blastodisc
Germinal disc may refer to:
In birds
The germinal disc, also called the blastodisc, is a small, circular, white spot (approximately 1.5-3 mm across) on the surface of the yellow yolk of a bird's egg.
In mammals
The blastodisc is a round single-cell layer of cells inside the blastula from which the embryo is going to form.
References
 | This developmental biology article is a stub. You can help Wikipedia by expanding it. |