Rectum

Tags: Anatomical Structure.

The rectum (from the Latin rectum intestinum meaning straight intestine) is the final straight portion of the large intestine in some mammals and the gut in others. The human rectum is about 12 centimetres (4.7 in) long and begins at the rectosigmoid junction (the end of the sigmoid colon) at the level of the third sacral vertebra or the sacral promontory depending upon what definition is used.

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artery

Middle rectal artery, Superior rectal artery

Dorlands prefix

r_05

Dorlands suffix

12697487

Gray page

1183

Gray subject

249

lymph

Deep inguinal lymph nodes, Inferior mesenteric lymph nodes, Internal iliac lymph nodes, Pararectal lymph nodes

MeSH name

Rectum

MeSH number

A03.556.124.526.767

nerve

Inferior mesenteric ganglion, Inferior anal nerves

precursor

Hindgut

vein

Superior rectal vein, Middle rectal veins