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Gastrula

Gastrula (gastrula – LNE (The Leningrad embryological nomenclature); Greek gastre – camber) – one of stages of development of a germ of metazoans (three-layered at vertebrata and two-layer at invertebrates) appearing owing to process of a gastrulation; differs in separation of a rudiment of an integument (ectoderm) from a rudiment of a digestive tract (entoderm).

 
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