Which device is used to listen to internal body sounds, such as the heart and lungs?

• A. Otoscope
• B. Sphygmomanometer
• C. Thermometer
• D. Stethoscope

Answer: (D)

You use a stethoscope to listen to internal body sounds like the heart and lungs. It amplifies the sounds inside the chest, allowing you to hear the heartbeat, rhythm, and breath sounds clearly. This helps you assess whether heart and lung activity is normal or if there are any abnormalities such as abnormal heart sounds or adventitious lung sounds like wheezes or crackles. The other devices serve different purposes: an otoscope is for examining the ears, a sphygmomanometer measures blood pressure, and a thermometer checks temperature. In CNA practice, the stethoscope is the tool you use for auscultation during routine cardiovascular and respiratory assessments.