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What is Hypoblast forms: and explain in detail?
Ans. D Prochordal plateRef: Netter's Clinical Anatomy, 3rd ed. pg. 39* Hypoblast and epiblast are 2 germ layers in the second week of embryonic development.* The hypoblast gives rise to prochordal plate which is the future site of mouth and forms the cranio-caudal axis.* Notochord is formed by epiblast cells.* Epiblast is also the source of all three germ layers.* First germ layer to be formed is the endoderm. Q* Remnants of notochord are nucleus pulposus and apical ligament of atlas.