GEORGE MATTEI / SCIENCE PHOTO LIBRARY GEORGE MATTEI / SCIENCE PHOTO LIBRARY
A still life of a stethoscope. Stethoscope. A stethoscope is used to listen to sounds within the human chest. It consists of two earpieces, tubing, and a round sound-detecting device with diaphragm (bottom). By pressing the diaphragm against a patients chest, sounds made by the heart and lungs can be detected. A stethoscope is useful in diagnosing respiratory ailments of the lungs, and abnormalities of the heart.
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