Separate names with a comma.
Discussion in 'DAT Discussions' started by arpitpatel86, Jun 5, 2008.
does the zygote for in the inner cells of the blastocyst?
good question.....i know that embryo is in the inner cells....is that then same thing as a zygote? stupid question i know...can some1 help me on that
zygote : sperm+egg
then it divides
morula -> goes to uterine wall -> becomes a blastula-> becomes a gastula
*basically these are just names for the zygote @ different stages.
first division in 32 hours, 2nd in 60 hours (4cells), 3rd in 72 hours (8)
by the 4th day it enters uterine wall. and you get 3 germ layers, meso/endo/ecto.
bastocyst has 3 types of cells, that impregnate the endometrium and thats where you get vasculation of the embryo from.
i just reviewed this a few days ago while studying, someone correct me if i'm wrong.
I think blastocyst is the last stage before the zygote actually becomes an embryo.