Question

The image below shows a common blood pressure gauge.

What does this device do?
A. measures the pressure of blood when the heart contracts and relaxes
B. measures the level of oxygen present in the blood
C. measures the electrical activity of the heart
D. measures the pressure of blood when the lungs expand and compress
PLEASE I NEED THIS ASAP

Answer 1

A. measures the pressure of blood when the heart contracts and relaxes

Step-by-step explanation:

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