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.

Proctodeum
Details
PrecursorSurface ectoderm
Gives rise toLower anal canal
Identifiers
Latinproctodeum
Anatomical terminology
edit
  • "Poumons". www.embryology.ch (in French). Archived from the original on 2019-09-27. Retrieved 2007-11-07.