Arterial supply to the colon comes from branches of the superior and inferior mesenteric arteries. Flow between these two systems communicates via a intestinal parasite colon cleansing "marginal artery" that runs parallel to the colon for its entire length. Historically, it has intestinal parasite colon cleansing been believed that the arc of Riolan, or the meandering mesenteric artery (of Moskowitz), is a variable wagon conecting the proximal SMA to the proximal IMA that can be extremely important if either tub is occluded.
The name sigmoid means S-shaped (see sigmoid). The walls of the sigmoid colon are muscular, and indenture to escalation the pressure inside the colon, causing the stool to stroke into the rectum.