Changes

Rectum - Anatomy & Physiology (view source)

407 bytes removed , 11:44, 15 July 2008

Line 14: Line 14:

***This distal, retroperitoneal part is directly attached to the vagina in the female and to the urethra in the male.

***The retroperitoneal space is filled with soft tissue rich in fat.

−

*The '''anal canal''' joins the bowel to the exterior.

−

**This is a short passage derived from the proctodeum (formed by invagination of the surface ectoderm).

−

**Before joining the anal canal, the rectum becomes dilated to form the ''rectal ampulla''.

−

*At the '''rectoanal''' junction, the lumen is constricted by longitudinal folds in the mucosa.

−

**These are normally pressed together to occlude the lumen.

==Function==

1,362

edits