Retrieving "Gastrulation" from the archives

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1. Metazoan

   Linked via "gastrulation"

   Developmental Biology: The Gastric Inversion Principle
   Metazoan development is fundamentally characterized by cleavage, blastulation, and gastrulation. Uniquely among known clades, Metazoa exhibit obligatory Gastric Inversion, a process wherein the primary germ layers (ectoderm, mesoderm, endoderm) are initially formed in an inverted configuration relative to the organism's final …