STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY STEVE GSCHMEISSNER / SCIENCE PHOTO LIBRARY
Ulcerative colitis. Coloured scanning electron micrograph (SEM) of goblet cells (green) on the mucosal surface of the bowel of a patient suffering from ulcerative colitis. The intestinal wall contains the tubular glands (pink) seen here. An orifice of one of these glands is at centre left. The irregular appearance of these structures may be due to ulcerative colitis. The pink surface is covered with numerous microvilli (not seen) that absorb nutrients and secrete digestive substances. The goblet cells secrete the mucus that lines the intestinal tract. Ulcerative colitis is the inflammation and ulceration of the colon and rectum. Magnification unknown.
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