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The lower part of the external hemorrhoidal plexus is drained by the inferior rectal veins (or inferior hemorrhoidal veins) into the internal pudendal vein. Veins superior to the middle rectal vein in the colon and rectum drain via the portal system to the liver. Veins inferior, and including, the middle rectal vein drain into systemic ...
The rectal venous plexus (or hemorrhoidal plexus [2]) is the venous plexus surrounding the rectum. [3] It consists of an internal and an external rectal plexus. [4]: 598 [5]: 294 It is drained by the superior, middle, and inferior rectal veins.
superior rectal artery: middle and inferior rectal arteries Vein: superior rectal vein draining into the inferior mesenteric vein and subsequently the hepatic portal system: middle and inferior rectal veins Hemorrhoids classification: internal hemorrhoids (not painful) external hemorrhoids (painful) Nerves: inferior hypogastric plexus: pudendal ...
Blood from the middle and inferior portions of the rectum is drained via the middle and inferior rectal veins. In portal hypertension , venous resistance is increased within the portal venous system ; when the pressure in the portal venous system increases above that of the systemic , blood is shunted through the portosystemic anastomoses .
The inferior rectal artery arises from the internal pudendal artery as it passes above the ischial tuberosity.. Piercing the wall of the pudendal canal, it divides into two or three branches which cross the ischioanal fossa, and are distributed to the muscles and integument of the anal region, and send offshoots around the lower edge of the gluteus maximus to the skin of the buttock.
A list of veins in the human body: Veins of the heart. Coronary sinus. Great cardiac vein; Oblique vein of left atrium; Middle cardiac vein; Small cardiac vein; Pulmonary veins; Superior vena cava. Brachiocephalic vein. Inferior thyroid vein; Inferior laryngeal vein; Pericardial veins; Pericardiophrenic veins; Bronchial veins; Vertebral vein ...
Inferior rectal veins (inferior hemorrhoidal veins) This page was last edited on 29 December 2019, at 21:51 (UTC). Text is available under the Creative Commons ...
In human anatomy, the inferior mesenteric vein (IMV) is a blood vessel that drains blood from the large intestine. It usually terminates when reaching the splenic vein , which goes on to form the portal vein with the superior mesenteric vein (SMV).