AskDefine | Define hindgut

Dictionary Definition

hindgut n : the caudal part of the alimentary canal in vertebrate embryos

User Contributed Dictionary

English

Noun

  1. The caudal part of the alimentary canal of an embryo, including the colon and the rectum

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Extensive Definition

The hindgut (or epigaster) is the posterior (caudal) part of the alimentary canal. It includes the distal third of the transverse colon and the splenic flexure, the descending colon, sigmoid colon, rectum and upper part of the anal canal.

Blood flow

Arterial supply is by the Inferior mesenteric artery, and venous drainage is to the portal venous system. Lymphatic drainage is to the chyle cistern.

Autonomic innervation

The hindgut is innervated via the inferior mesenteric plexus. Sympathetic innervation is from the Lumbar splanchnic nerves (L1-L2), parasympathetic innervation is from S2-S4.

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