blastosphere
Noun
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is a type of: conceptus, embryo, fertilized egg - an animal organism in the early stages of growth and differentiation that in higher forms merge into fetal stages but in lower forms terminate in commencement of larval lifesubtypes: blastocyst, blastodermic vessicle - the blastula of a placental mammal in which some differentiation of cells has occurredhas:
- blastocele, blastocoel, blastocoele, cleavage cavity, segmentation cavity - the fluid-filled cavity inside a blastula
- trophoblast - the membrane that forms the wall of the blastocyst in early development; aids implantation in the uterine wall
same as: blastula
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