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→Species Differences
==Species Differences==
==Species Differences==
===Ruminant===
*The '''ascending colon''' is the longest part of the colon and is composed of three parts:
**'''Ansa proximalis'''
***Has a sigmoid flexure that passes around the caudal border of the mesentry to the left side of the root of the mesentry.
**'''Ansa spiralis'''
***Consists of two centripetal turns and two centrifugal turns in the ox.
****There are three turns in the sheep and four in the goat.
****In the ox, the ansa spiralis is a flat disc, whilst in the small ruminants it takes the form of a cone.
**'''Ansa distalis'''
***Goes back around the caudal border of the mesentry, to the right side of the root of mesentry.
***It then passes cranially adjacent to the mesentry until it reaches the cranial border of the mesentry.
*The '''transverse colon''' crosses the midline of the abdomen, from right to left at the cranial border of the mesentry.
*The '''descending colon''' continues caudally to the rectum and anus.
**It has a sigmoid flexure before it enters the pelvic cavity.
===Horse===
===Pig===
==Links==
==Links==