Blood Vessel. An angioplasty is performed by inserting a small balloon into the blood vessel to open blockages and allow better blood flow.

10. The esophagus connects the pharynx and the stomach.

Perineum. The perineum is the hair-free patch of skin at the base of the scrotum.

Muscle Pain. "Myalgia" is a symptom of many disorders and diseases.

Cardiovascular Disease. Atherosclerosis is the condition in which arteries become clogged with cholesterol and other fatty materials.

Stanford. Many people have drawn parallels between the Stanford Prison Experiment and prisoner abuse scandals such as the one at Abu Ghraib.