Proctodeum

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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.

External links

Prenatal development/Mammalian development of digestive system, coelom and septa, and mesenchymal mesenteric masses (GA 11.1101, TE E5.4, 5.8-9)

Upper GI tract and accessory	Stomodeum Foregut: upper GI Buccopharyngeal membrane Rathke's pouch Tracheoesophageal septum accessory Pancreatic bud Hepatic diverticulum

Lower GI tract	Midgut Hindgut: Urorectal septum Proctodeum Cloacal membrane Cloaca

Mesentery	Dorsal mesentery Ventral mesentery

Thoracic diaphragm	Septum transversum

Other	Intra-embryonic coelom Extra-embryonic coelom

anat (t, g, p)/phys/devp/enzy

noco/cong/tumr, sysi/epon

proc, drug (A2A/2B/3/4/5/6/7/14/16), blte

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