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Islet cells are located in the pancreas and make hormones, including insulin, glucagon, somatomammotropin, and pancreatic

An abnormal heartbeat (arrhythmia) is any variation in the normal heartbeat. Abnormal heartbeats occur when the heart has an

Irritable bowel syndrome (IBS) is a digestion problem that causes episodes of belly pain, cramping or bloating, and diarrhea or

Iron deficiency anemia means that your body doesn't have the iron it needs to make enough red blood cells. Red blood cells carry

Iritis is an inflammation of the colored part of the eye (iris) that can cause redness, pain, light sensitivity, and in some cases

An intravenous pyelogram (IVP) is an X-ray test that uses a special dye (contrast material) to outline the structure of the

An intraductal papilloma is a noncancerous (benign) small growth inside a milk duct in the breast. It may appear on the skin near

The intestine (bowel) is the long, winding, tube that is part of the digestive tract. The intestine helps to process food, extract

Insulin resistance is a condition in which body cells do not fully respond to the action of insulin, a hormone that controls the

Insulin is a hormone produced in the pancreas that allows sugar (glucose) to enter body cells, where it is used for energy. It