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anal pit


Definition: an ectodermally lined depression under the caudal eminence to the terminal part of the embryonic hindgut; at its bottom there is an epithelial plug. When this epithelial plug ruptures, the anal orifice is established.

Synonym(s): proctodeum2

Further information

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