Sigmoid Colon Anatomy

After the distal descending colon has curved medially it enters the pelvis where it gains a mesentery and is then called the sigmoid colon. It forms a loop that averages about 3540 cm in length.

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The sigmoid colon derives its name from the fact that it is curved in the form of an s greek sigma.

Sigmoid colon anatomy. In this article we will discuss the anatomy of the sigmoid colon including its blood supply venous drainage lymphatic drainage. Sigmoid colon a terminal section of the large intestine that connects the descending colon to the rectum. It is the last part of the colon before the rectum.

It helps to flow the fecal matter from the colon to rectum and then to the anus. This part of the colon normally lies within the pelvis but on account of its freedom of movement it is liable to be displaced into the abdominal cavity. Lymphatics travel with vessels to the inferior mesenteric group.

Its function is to store fecal wastes until they are ready to leave the body. Feces stays in this sigmoid colon until they are in a state of elimination from the body. Billions of bacteria coat the colon and its contents living in a healthy balance with the body.

The long length of the mesentery permits this part of the colon to be particularly mobile. The colon removes water salt and some nutrients forming stool. The loop is typically shaped like a greek letter sigma or latin letter s.

The sigmoid colon is a short curving of the colon just before the rectum. The sigmoid colon is the part of the large intestine that is closest to the rectum and anus. It acts as a site for water absorption from the faeces as a site for flatus to be stored before being expelled and as a site of peristalsis.

41 8143 14 votes. The long length of the mesentery permits this part of the colon to be particularly mobile. The sigmoid colon is attached to the posterior pelvic wall by a mesentery the sigmoid mesocolon.

Sigmoid colon or pelvic colon is a portion of the large intestine which is closest to the rectum and anus. Sigmoid colon gross anatomy. Muscles line the colons walls squeezing its contents along.

Sigmoidoscopy Medicine Britannica