Blastodisc

A small whitish spot on the surface of the EGG YOLK where cleavage begins. Upon fertilization the cytoplasm streams from the vegetal pole away from the yolk to the animal pole where cleavage will occur. This germinal area eventually flattens into a layer of cells (BLASTODERM) that covers the yolk completely.

Year introduced: 2008

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Tree Number(s): A16.331.042

MeSH Unique ID: D054239

Entry Terms:

• Blastodiscs
• Germinal Area
• Area, Germinal
• Areas, Germinal
• Germinal Areas
• Germinal Disc
• Disc, Germinal
• Discs, Germinal
• Germinal Discs

Previous Indexing:

• Chick Embryo (1964-2007)

All MeSH Categories
Anatomy Category
Embryonic Structures
Embryo, Nonmammalian
Blastodisc