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Flag Counter
  2. World Encyclopedia
  3. Proctodeum - Wikipedia
Proctodeum - Wikipedia
From Wikipedia, the free encyclopedia
Proctodeum
Details
PrecursorSurface ectoderm
Gives rise toLower anal canal
Identifiers
Latinproctodeum
Anatomical terminology
Coronal section through the anal canal. (Symington.) B. Cavity of urinary bladder. V.D. Ductus deferens. S.V. Seminal vesicle. R. Second part of rectum. A.C. Anal canal. L.A. Levator ani. I.S. Sphincter ani internus. E.S. Sphincter ani externus.
Coronal section through the anal canal. (Symington.) B. Cavity of urinary bladder. V.D. Ductus deferens. S.V. Seminal vesicle. R. Second part of rectum. A.C. Anal canal. L.A. Levator ani. I.S. Sphincter ani internus. E.S. Sphincter ani externus.

A proctodeum is the back ectodermal part of an alimentary canal. It is created during embryogenesis by a folding of the outer body wall. It will form the lower part of the anal canal, below the pectinate line, which will be lined by stratified squamous non-keratinized (zona hemorrhagica) and stratified squamous keratinized (zona cutanea) epithelium. The junction between them is Hilton's white line.

  • "Poumons". www.embryology.ch (in French). Archived from the original on 2019-09-27. Retrieved 2007-11-07.


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This developmental biology article is a stub. You can help Wikipedia by adding missing information.

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