Sigmoid Anatomy
The loop is typically shaped like a greek letter sigma ς or latin letter s thus sigma oid. The sigmoid colon is part of the hindgut.
Sigmoid An Overview Sciencedirect Topics
The sigmoid colon derives its name from a greek letter sigma.
Sigmoid anatomy. 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. Lymphatics travel with vessels to the inferior mesenteric group. Sigmoid sinus within the head are small cavities or spaces referred to as sinuses and they primarily serve as drainage for venous blood.
It is the last part of the colon before the rectum. 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. 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 connects the descending colon with the rectum. 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 attached to the posterior pelvic wall by a mesentery the sigmoid mesocolon.
The long length of the mesentery permits this part of the colon to be particularly mobile. It forms a loop that averages about 3540 cm 1378 1575 in in length. The sigmoid colon is the terminal portion of the large intestine before reaching the rectum.
In this article we will discuss the anatomy of the sigmoid colon including its blood supply. Some are found within the cranial bones and others in soft tissues of the head. 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 commonly divided into iliac and pelvic parts. Sigmoid colon gross anatomy. Like the descending colon.
This dual structure is considered an extension of the. The long length of the mesentery permits this part of the colon to be particularly mobile.
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