hindgut

Hindgut
Profile view of a human embryo estimated at twenty or twenty-one days old. (Hindgut labeled at lower left.)
Primitive kidney and bladder, from a reconstruction. (Hindgut labeled at upper right.)
Gray's	subject #241 1101
Carnegie stage	10
Precursor	Mesenchyme

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.

Additional images

Abdominal part of digestive tube and its attachment to the primitive or common mesentery. Human embryo of six weeks.

Tail end of human embryo twenty-five to twenty-nine days old.

See also

• Foregut
• Midgut

External links

• digest-035 — Embryology at UNC

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