A surgical anastomosis is the joining of two body structures that are not currently connected.

Another example of an anastomosis would be after a partialcolon resection.

Anarteriovenous fistula, created fordialysis, is an example of a jot down of surgical anastomosis.

Gastric bypass illustration showing a before and after image of the human digestive system

PIXOLOGICSTUDIO/SCIENCE PHOTO LIBRARY / Getty Images

For this procedure, a vein and an artery are spliced together, creating a larger blood vessel.

This bypasses part of the intestine, effectively decreasing the ability of the intestine to absorb calories.

Khan MS.Coronary artery bypass grafting: Surgical anastomosis: Tips and tricks.

In: Murashita T, ed.The Current Perspectives on Coronary Artery Bypass Grafting.

American Cancer Society.Surgery for colon cancer.

Society for Vascular Surgery.Dialysis access.