Is there an inferior rectal artery?
Is there an inferior rectal artery?
The inferior rectal artery passes medially from the pudendal canal to supply the anal canal and sphincter.
What gives off the inferior rectal artery?
The inferior rectal artery arises from the internal pudendal artery as it passes above the ischial tuberosity.
Where does the middle and inferior rectal artery come from?
The middle rectal artery usually arises from the internal iliac artery. It is distributed to the rectum above the pectinate line. It anastomoses with the inferior vesical artery, superior rectal artery, and inferior rectal artery.
Where does inferior rectal nerve branch from?
pudendal nerve
The inferior rectal nerve is a branch of the pudendal nerve, originating from the ventral rami of the second, third, and fourth sacral nerve roots (S2–S4). The inferior rectal nerve is comprised of both somatic and autonomic nerve fibers and is consequently distributed to skeletal and smooth muscles and skin.
What are the branches of the inferior mesenteric artery?
The branches of the inferior mesenteric artery include 1) the left colic, which is located retroperitoneally and supplies the descending colon; 2) the sigmoid branches, which supply the sigmoid colon; and 3) the superior rectal artery, which is the terminal branch of the inferior mesenteric artery at the pelvic brim.
Where does the inferior rectal vein drain?
| Inferior rectal veins | |
|---|---|
| Drains from | rectum |
| Drains to | internal pudendal vein |
| Artery | inferior rectal artery |
| Identifiers |
Where is middle rectal artery?
The middle rectal artery, also called the middle hemorrhoidal artery, or middle anorectal artery, is an inconsistent branch of the anterior division of the internal iliac artery which supplies the rectum. It is found in the lesser pelvis, running within the lateral fascial coverings of the mesorectum.
What is inferior mesenteric artery?
The inferior mesenteric artery (IMA) comes off the abdominal aorta a few inches below the takeoff of the superior mesenteric artery (SMA). The artery runs slightly lateral to the abdominal aorta after its origin at the level of the third lumbar vertebrae behind the third part of the duodenum.
What is the inferior artery?
The inferior mesenteric artery (IMA) is a major branch of the abdominal aorta. It supplies arterial blood to the organs of the hindgut – the distal 1/3 of the transverse colon, splenic flexure, descending colon, sigmoid colon and rectum.
What is inferior rectal vein?
The inferior rectal veins are located in the external hemorrhoidal plexus. They are surrounded by loose connective tissue, so they do not get much support or constraint from the body. They are therefore less able to resist blood pressure.
What does the inferior mesenteric vein do?
The inferior mesenteric vein (IMV) drains the descending colon, the sigmoid colon, and the rectum through the left colic vein, the sigmoid branches, and the superior rectal vein, respectively. The IMV joins the splenic vein, which then joins the SMV to form the portal vein. The portal vein enters the liver.
