The ascending branch crosses in front of the left kidney and ends, between the two layers of the transverse mesocolon, by sigmoid artery.
2.
The sigmoid colon is supplied with blood from several branches ( usually between 2 and 6 ) of the sigmoid arteries, a branch of the IMA . The IMA terminates as the superior rectal artery.
3.
Each passes obliquely downward and lateralward behind the peritoneum, resting on the Psoas major, the right lying in front of the inferior vena cava and behind the middle colic and ileocolic arteries and the terminal part of the ileum, the left behind the left colic and sigmoid arteries and the iliac colon.
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