The mesentery surrounds the intestines in the abdomen. It begins in the back of the abdomen, where the aorta of the heart meets with a large artery. This artery is the superior mesenteric artery experts sometimes refer to as the root of the mesentery. This root marks the beginning of the mesentery as it reaches from this area throughout the rest of the abdomen. The various regions of the mesocolon connect to the colon itself. The mesoappendix connects the ileum of the small intestine to the appendix. The mesorectum attaches to the rectum.
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