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cloacal membrane

 

Definition: a transitory membrane in the caudal area of the embryo, separating the proctodeum from the cloaca; it is divided into anal and genitourinary membranes that break down during the eighth to ninth week of human development to establish the external opening for the alimentary and genitourinary tracts.

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

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