proctodaeum

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“
An epiblastic tucking-in at st., the stomodaeum pre-figures the mouth; pr., the proctodaeum, is a similar posterior invagination which will become the anus.

Examples (3)

  • An epiblastic tucking-in at st., the stomodaeum pre-figures the mouth; pr., the proctodaeum, is a similar posterior invagination which will become the anus. —  Text Book of Biology, Part 1: Vertebrata
  • The part of the cloaca from the upper wall of which it forms belongs to the proctodaeum, the ectodermic invagination of the rectum (Chapter 2.27); hence its epithelial covering can develop the same horny growths as the corneous layer of the epidermis. —  The Evolution of Man — Volume 2
  • The anus is formed by a tucking in, the proctodaeum, similar to the stomodaeum. —  Text Book of Biology, Part 1: Vertebrata
 

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