Stock Photo: COLON, DRAWING. COLON, DRAWING The colon and its vascularization. The large intestine is composed of the caecum, the colon ascending, transverse, descending and sigmoid colon, the rectum and the anal canal. The colon is irriguated by the superior and inferior mesenteric arteries, derivated from the abdominal aorta, and by their branches. See. images 1008407 for the colon and its vascularization on a white background, 1008707 and 1008807 on a masculine silhouette, 1008507 and 1008607 on a feminin