Large Intestine

Give a brief description of the function of the large instine.

Where water and electrolyte absorption occurs, semi-solid feces start to form.

Describe the three longitudinal muscles in the large intestine known as the Tenia Coli

Tenia mesencolic - mesocolon attaches
Tenia omental - greater omentum attaches
Tenia libera - free anterior band
Important for peristalsis

What is the distinguishing feature of the tenia omental

They have omental appendices - fatty projections.

What are hausta

Sac like sacculations formed by the shortening of the colon wall between the taenia coli.

Describe the cecum

First part of the large intestine, continous with ascending colon. Terminal illeum connects with the ceum at ileal orifice via iliocecal valve.

Describe the ascending colon

Retroperitoneal, ascends from cecum to liver where it takes 90 degree turn at the R colic flexure.

Describe the transverse colon

Longest part, from R colic flexure to L colic flexure. Connects with the diaphragm via the phrenicolic lig. Has a mesentery - transverse mesocolon.

Describe the descending the colon

Deeper than ascending, from L colic flexure to sigmoid colon in the L iliac fossa.

Describe the sigmoid colon

S shaped, joins descending colon to rectum. Has a mesentery - sigmoid mesocolon