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gastrulation

Pronunciation: gas'tru-la'shun

Definition: Transformation of the blastula or blastocyst into the gastrula; the development and invagination of the embryonic germ layers. In human embryos, gastrulation is the process by which the bilaminar embryonic disk is converted into a trilaminar embryonic disk.

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.

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