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Definition of gastrula
gastrulas
orgastrulae
play \ˈga-strə-ˌlē, -ˌlī\: an early metazoan embryo in which the ectoderm, mesoderm, and endoderm are established either by invagination of the blastula (as in fish and amphibians) to form a multilayered cellular cup with a blastopore opening into the archenteron or by differentiation of the blastodisc (as in reptiles, birds, and mammals) and inward cellular migration — compare blastula, morula
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Origin and Etymology of gastrula
New Latin, from gastr-
Medical Dictionary
gastrula
playMedical Definition of gastrula
gastrulas
orgastrulae
\-ˌlē, -ˌlī\play play: an early metazoan embryo in which the ectoderm, mesoderm, and endoderm are established either by invagination of the blastula (as in fish and amphibians) to form a multilayered cellular cup with a blastopore opening into the archenteron or (as in reptiles, birds, and mammals) by differentiation of the upper layer of the blastodisc into the ectoderm and the lower layer into the endoderm and by the inward migration of cells through the primitive streak to form the mesoderm—compare morula
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Britannica.com: Encyclopedia article about gastrula
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