JAMES KING-HOLMES / SCIENCE PHOTO LIBRARY JAMES KING-HOLMES / SCIENCE PHOTO LIBRARY
Stethoscope. Stethoscope used to listen to noises made within the body by the heart, lungs and digestive system. It is comprised of two earpieces (at top), tubing, and a round sound-detecting device (silver). The sound-detecting device has a wide diameter diaphragm to listen to high-pitched sounds; the smaller concave bell side with hole is used to listen to low-pitched sounds. Internal noises can be heard by pressing the device against a patient's body. A stethoscope is useful in the diagnosis of respiratory ailments of the lungs, abnormalities of the heart, and movements in the digestive system.
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