When you exhale, the diaphragm
A. moves upwards
B. moves downwards
D. none of the above
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Other quiz: Circulatory System
What function does the heart do?
A. Protects organs and produces red blood cells.
B. Generates heat.
C. Breaks down food into nutrients.
D. The heart is a pump, which moves the blood. The arteries and veins are the pipes where the blood flows.