CAROL & MIKE WERNER / SCIENCE PHOTO LIBRARY CAROL & MIKE WERNER / SCIENCE PHOTO LIBRARY
Diverticulum, illustration. Diverticula are small bulging sacs (shown on colon, lower right) that can form in the lining of the digestive tract, most often in the lower part of the large intestine or colon. Sometimes these sacs become infected or inflamed, which is known as diverticulitis.
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