Proctodeum
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 | |
| Precursor | surface ectoderm |
| Gives rise to | lower anal canal |
| Identifiers | |
| Latin | Proctodeum |
| Anatomical terminology | |
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