What is inferior mesenteric artery?
The inferior mesenteric artery (IMA) is one of the three non-paired major splanchnic arteries, in the abdominal cavity, arising from the abdominal aorta and supplying the hindgut. It is the smallest of the three anterior visceral branches of the abdominal aorta.
Where are SMA IMA anastomosis?
The SMA and IMA anastomose via the marginal artery of the colon (artery of Drummond) and via Riolan’s arcade (also called the “meandering artery”, an arterial connection between the left colic artery and the medial colic artery).
What is an unpaired artery?
The unpaired visceral arteries supply the gastrointestinal (GI) tract, spleen, pancreas, gallbladder, and liver and are made up of the celiac trunk, superior mesenteric artery (SMA), and inferior mesenteric artery (IMA).
What are mesenteric capillaries?
The mesenteric arteries take blood from the aorta and distribute it to a large portion of the gastrointestinal tract. The term mesenteric artery is also used to describe smaller branches of these vessels which, particularly in smaller animals, provide a significant source of vascular resistance.
What does the mesenteric artery do?
The superior mesenteric artery provides oxygenated blood and nutrients to the intestines. These organs are part of the digestive system. The artery branches off of the aorta, which is the body’s largest blood vessel. Superior refers to the artery’s location above other arteries that supply the intestines.
What is the mesentery?
The mesentery is a fold of membrane that attaches the intestine to the abdominal wall and holds it in place. Mesenteric lymphadenitis is an inflammation of the lymph nodes in the mesentery.
What artery is the IMA?
Inferior Mesenteric Artery. The IMA arises from the left anterior surface of the aorta at the level of the third lumbar vertebral body. Initially retroperitoneal, the IMA branches as it enters the sigmoid mesocolon before giving rise to the left colic, sigmoidal, and superior rectal vessels.
What does the IMA supply blood to?
The IMA supplies blood to the distal one-third of the transverse colon, descending colon and proximal two-thirds of the rectum.
What does the inferior phrenic artery supply?
The inferior phrenic arteries (IPAs) are paired branches of the abdominal aorta/celiac trunk supplying the diaphragm. Their importance lies with the fact that the right inferior phrenic artery is the most common extrahepatic arterial supply of a hepatocellular carcinoma.
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.
What is the definition of mesenteric?
noun, plural mes·en·ter·ies. Anatomy. an organ that, as a double fold of peritoneum, loops around the pancreas and the intestines, holding them securely to the abdominal wall.
Where is the inferior mesenteric artery located in the body?
inferior mesenteric artery. a visceral branch of the abdominal aorta, arising just above the division into the common iliacs and supplying the left half of the transverse colon, all of the descending and iliac colons, and most of the rectum. It has left colic, sigmoid, and superior rectal branches. Inferior mesenteric artery.
Which is the smallest artery in the abdominal cavity?
Inferior mesenteric artery. Dr Kieran Kusel and Dr Vijay et al. The inferior mesenteric artery (IMA) is one of the three non-paired major visceral arteries in the abdominal cavity arising from the abdominal aorta and supplying the hindgut. It is the smallest of the three anterior visceral branches of the abdominal aorta.
Where does the IMA cross the ureter?
The IMA runs obliquely downwards towards the pelvic brim, initially anterior and then to the left of the aorta. After giving off the left colic and sigmoid arteries, it crosses the origin of the left common iliac artery at the sacroiliac joint medial to the ureter, with the inferior mesenteric vein lying between the two.
Where does the superior rectal artery enter the pelvis?
The superior rectal artery is a continuation of the inferior mesenteric artery, supplying the rectum. It descends into the pelvis, crossing the left common iliac artery and vein. At the S3 vertebral level, the artery divides into two terminal branches – one supplying each side of the rectum.