One of the mysteries of the English language finally explained.
A blastula having the form of a disk of cells on top of the yolk in the eggs of reptiles and birds.
- ‘In amniotes, the embryo develops in a blastodisk atop a large yolk mass.’
- ‘At 38 minutes after insemination, the first cleavage was observed and the first cleavage furrow of the blastodisk appeared at 53 minutes.’
- ‘Yolk syncytial nuclei originated from the deepest, open cells beneath the blastodisk.’
- ‘The blastodisks were located, removed aseptically, and stored in cryovials at - 80 C for DNA analysis.’
- ‘Note the blastula in reptiles is called a blastoderm or blastodisk because the divisions have been concentrated into a thin disk of cells at the animal pole.’
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