Germinal disc

Germinal disc may refer to:

in Birds

The germinal disc, also called the blastodisc, is a small, circular, white spot (approximately 2-3 mm across) on the surface of the yellow yolk of a bird's egg.

in Mammals

The blastodisc refers to a round single-cell layer of cells inside the blastula from which the embryo is going to form.

References

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