Gastrulation Human Embryology 3rd Week Animated MedicoVisual

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Gastrulation in Frog: • Gastrulation is a process of migration and re-arrangement of prospective organ forming cells already present in the blastula. • It is brought about by several types of morphogenetic movements taking place at the same time. • Epiboly: The thinning and spreading of the animal cap cells over the vegetal hemisphere, powered by proliferation and radial intercalation. • Vegetal rotation: Vegetal cells asymmetrically press up against the inner blastocoel roof on the dorsal side. • Bottle cell formation and invagination: Localized apical constriction at the dorsal blastopore lip creates anisotropic forces that foster invagination. • Involution and cell migration: The leading edge of invaginating cells crawls up onto the blastocoel roof. • Convergence and extension: The targeted medial-to-lateral intercalation of cells on the midline (convergence)drives anterior-posterior axis elongation (extension). • Chordate Zoology- https://amzn.to/3zLxt9X • MODERN TEXT BOOK OF ZOOLOGY: VERTEBRATES- https://amzn.to/3u7GCpV • MODERN TEXT BOOK OF ZOOLOGY: INVERTEBRATES- https://amzn.to/3HywZFY • TEXT BOOK OF BOTANY B.Sc.Ist year- https://amzn.to/3tLb6gX • #gastrulationinfrog • #developmentalbiology • #amphibiangastrulation

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