Taenia coli

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Teniae coli
Gray1076.png
Iliac colon, sigmoid or pelvic colon, and rectum seen from the front, after removal of pubic bones and bladder. (Tænia coli not labeled, but visible at center.)
Gray1165.png
Female pelvis and its contents, seen from above and in front. (Taenia coli not labeled, but visible at right.)
Details
Latin Taeniae coli
Identifiers
Gray's p.1186
Dorlands
/Elsevier
t_01/12789456
TA A05.7.03.013
FMA FMA:76487
Anatomical terminology

The teniae coli (also taeniae coli) are three separate longitudinal ribbons of smooth muscle on the outside of the ascending, transverse, descending and sigmoid colons. They are visible, and can be seen just below the serosa or fibrosa. They are the Mesocolic, Free and Omental Coli. The teniae coli contract lengthwise to produce the haustra, the bulges in the colon.

The bands converge at the root of the vermiform appendix. At the rectosigmoid junction, the taeniae spread out and unite to form longitudinal muscle layer.

These bands correspond to the outer layer of the muscularis externa, in other portions of the digestive tract.

Large bowel (sigmoid colon) with multiple diverticula. These appear on either side of the longitudinal muscle bundle (taenium).

The tæniæ coli are regulated by the sacral nerves of the spinal cord, which are under control of the parasympathetic nervous system.[1]

References[edit]

  1. ^ Lambert, H. Wayne; Wineski, Lawrence E. (2011). Anatomy & Embryology. Lippincott Williams & Wilkins. p. 65. Destruction of the sacral spinal cord will eliminate parasympathetic outflow to the hindgut, pelvic organs, and perineum as well as somatic innervation to much of the pelvis and lower limbs. Because it stimulates gut motility and tone, loss of parasympathetic input will result in relaxation and inactivity of the teniæ coli in the descending colon. 

External links[edit]

- "Digestive System: Alimentary Canal: colon, taeniae coli"