What is the name of the blastula stage in humans?
What is on the inside
what do the cells form
what cells form the outside
what do the outside cells form?
In human zygote form due to fertilization of male sperm and female egg undergoes Cleavage which is rapid cell division first 8 cell stage Morula is formed and it further divide and form a ball of cell with a fluid filled cavity it its center called blastocoel and It is 32 cell blastula stage which is known as blastocyst in human
Hence the blastula stage in human is called Blastocyst
Blastocyst is contain two layer of cell
1)Inside is Inner cell mass which contain two type of cell Epiblast which form Embryo(Ectoderm,endoderm,mesoderm)&
Hypobast which form extra embryonic membrane
And contain Blastocoel filled cavity in the centre
2) Outer most layer is Trophoblast which helps in Implantation and later become part of placenta
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