proctodeum

{{Infobox embryology

| Name = Proctodeum

| Latin = proctodeum

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| Precursor = Surface ectoderm

| GivesRiseTo = Lower anal canal

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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.