The main branches and distribution of the superior mesenteric artery

1. Inferior pancreaticoduodenal artery.

The inferior pancreaticoduodenal artery is small, and it runs posteriorly to the right through the superior mesenteric vein, and is divided into anterior and posterior branches, which are anastomosed with the superior anterior and superior posterior pancreaticoduodenal arteries, respectively. This artery sometimes originates from the first jejunum.

Arteries. 2. Empty and ileal arteries.

Originates from the superior mesenteric artery.

The convex side, about 12 to 16, line in the mesentery. The superior one is distributed in the jejunum and is called the jejunal artery; The lower part of the ileum is called the ileal artery. Each vein is divided into ascending and descending branches, which anastomoses with the ascending and descending branches of the adjacent intestinal arteries to form the first-order arch.

The branches of the arterial arch are then anastomosed to form the secondary arch, which in turn can be formed.

Three, four, and five level bows.

3. Middle colonic artery.

The middle colonic artery, which originates from the concave side of the superior mesenteric artery at the inferior edge of the pancreatic head, then enters the transverse mesocolon and runs anteriorly to the right; It is divided into two branches: left and right. The right branch goes up to the right and reaches the right curvature of the colon and anastomoses with the ascending branch of the right colonic artery; The left branch runs to the left and anastomoses with the ascending branch of the left colonic artery, called the arterial arch. The left and right branches emit small branches in the transverse colon during the stroke.

4. Right colonic artery.

Originating from the superior mesenteric vein below the origin of the middle colonic artery or co-trunking with the middle colonic artery, it travels right through the deep peritoneal surface of the posterior abdominal wall and is close to the ascending colon.

The left edge is divided into ascending and descending. The ascending branch anastomoses with the right branch of the middle colon vein; The descending artery descends to anastomoses with the superior trunk of the ileocolic artery. This artery gives off small branches that are distributed in the upper part of the ascending colon2 and 3 and the right curvature of the colon.

5. Ileocolic artery.

The ileocolicartery is the lowest branch of the concave side of the superior mesenteric artery, which descends obliquely to the right on the deep peritoneal surface of the posterior abdominal wall, and is generally divided into upper and inferior trunks. The superior trunk anastomoses with the descending artery of the right colonic artery; The inferior trunk descends to the end of the superior mesenteric artery and anastomoses into an arch.

Clinical Core Test Points-Chapter 1 Anatomy-07 Vasculature03 Arteries 04 Abdominal Arteries 03 Composition of Superior Mesenteric Artery and Inferior Mesenteric Artery.

Answer]: The branches of the superior mesenteric artery are:

Pancreaticoduodenal hypohigh-mass artery pancreas, duodenum.

Jejunal artery, ileal artery or accompanying jejunum, ileum.

The middle colonic artery transverse colon, and anastomoses with the right colonic artery and the left colonic artery.

The right colonic artery ascends to the colon and anastomoses with the middle colonic artery and the ileo-reqi colonic artery.

Ileocolic artery The beginning of the ascending colon, the end of the ileum, the cecum, and the appendix (appendiceal artery), anastomoses with the right colonic artery.

a.Empty and ileal arteries.

b.Ileocolic artery.

c.Left colonic artery.

d.Right colonic artery.

e.Middle Colonic Artery.

Correct answer: c

a.Right colonic artery.

b.The middle colonic artery is suffocated and resistant to branches.

c.Left colonic artery.

d.Ileocolic artery.

The answer is absolutely certain: c

Answer]: c Test Guidance] The branches of the mesenteric superior artery are: inferior pancreaticoduodenal artery, empty erection of the intestinal artery, ileocolic artery, right obstruction colonic artery, and middle colonic artery.