Characteristic features of avian gastrulation, Biology

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Characteristic Features of Avian Gastrulation

Creation of hypoblast and its important role in formation of the axis and orientation of embryo.
Existence of the cells of all the three germinal areas in the epiblast.
Creation of the primitive streak and its regression in law stages of gastrulation.
Nonexistence of archenteron formation.
Gastrula cell movements include poly invagination, involution, convergence, divergence and epiboly.
Cephalocaudal separation of axial structures and growth of the embryo during gastrulation.

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