Explain the term gastrulation
Explain the term gastrulation? How for the period of gastrulation are the first two germ layers produced? Also explain these germ layers?
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Gastrulation is the procedure by which a part of the blastula wall goes through invagination in the blastocele, structuring a tube known as archenteron (primitive intestine). The cells of the inside side of the tube form the endoderm (germ layer) and cells of the external side form the ectoderm (another germ layer). It is starting of the tissue differentiation in embryonic.
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