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holoblastic and blastomeres due to egg cell beings microlecithal=equal in size
*first division occurs in 30 hours; much slower in vetebrates |
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| process which causes tight junction of the cells; most blastomeres become polarized here |
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| consists of 100 inner cells; inner cells develop into embryo proper and some extraembroytic membranes |
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| secretes enzymes, which enable blastocyt to penetrate uterine lining; gives rise to chorion |
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| derived from blastocyt cavity; second cavity; cosists of two layer discs |
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