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.)
Latin	metenteron
Gray's	subject #241 1101
Carnegie stage	10
Precursor	Mesenchyme
Code	TE E5.4.9.0.2.0.1

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

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.

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.

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