Wednesday, 30 August 2017

Blood supply of sigmoid colon | PGI Nov 2017 Preparations MCQ


Blood supply of sigmoid colon is by 

A. Middle colic A 
B. Marginal a 
C. Left colic A 
D. Sigmoid A
E. Right colic artery



Ans. B. Marginal A ; (D) Sigmoid A :
• Blood supply of sigmoid colon is from
— Marginal artery (of Sudeck)
— Sigmoid artery
• The marginal Ais arterial arcade situated along the concavity of colon formed by anastomosis in between arteries -- ileocolic, Rt. colic, midd1e colic, left colic and sigmoid arteries. It is closest to colon in its descending and sigmoid parts.
• Sigmoid A is 2-3 in no, branch of inferior mesenteric A : supply transverse and descending colon. 
• Left colic A ;.a..branch. of inferior mesenteric A : supply transverse and descending colon.
• Middle colic A :br. of superiormesenteric A : supply transverse colon.