Sigmoid Anatomy

Sigmoid sinus within the head are small cavities or spaces referred to as sinuses and they primarily serve as drainage for venous blood. This dual structure is considered an extension of the.

The Colon Ascending Transverse Descending Sigmoid

In this article we will discuss the anatomy of the sigmoid colon including its blood supply.

Sigmoid anatomy. The long length of the mesentery permits this part of the colon to be particularly mobile. Like the descending colon. The iliac colon stretches from the crest of the ilium or upper border of the hipbone to the inner border of the psoas muscle which lies in the left iliac fossa.

After the distal descending colon has curved medially it enters the pelvis where it gains a mesentery and is then called the sigmoid colon. The sigmoid colon is the terminal portion of the large intestine before reaching the rectum. Some are found within the cranial bones and others in soft tissues of the head.

It connects the descending colon with the rectum. Lymphatics travel with vessels to the inferior mesenteric group. The sigmoid sinus is actually a pair of two sinuses right and left that enable veins to spread from the middle of the head downwards.

It is the last part of the colon before the rectum. The sigmoid colon is commonly divided into iliac and pelvic parts. The loop is typically shaped like a greek letter sigma ς or latin letter s thus sigma oid.

The sigmoid colon is attached to the posterior pelvic wall by a mesentery the sigmoid mesocolon. It forms a loop that averages about 3540 cm 1378 1575 in in length. 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.

The sigmoid colon derives its name from a greek letter sigma. Sigmoid colon gross anatomy. The sigmoid colon or pelvic colon is the part of the large intestine that is closest to the rectum and anus.

The sigmoid colon is part of the hindgut. The long length of the mesentery permits this part of the colon to be particularly mobile.

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