1
Q
when does it take place
A
in first two months after fertilization
2
Q
what is it
A
early development of a organism
3
Q
ectoderm
A
forms the skin and nervous system
4
Q
mesoderm
A
forms kidneys, skeleton, muscles, blood vesicles and reproductive organs
5
Q
endoderm
A
forms lungs, liver and lining of the digestive system
6
Q
last layer of blastula
A
hollow system
Meiosis
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