★ Human Body Systems Quiz
What is the main job of the digestive system?
A. break down foods into nutrients that can be used by the body
B. take in oxygen and exhale waste like carbon dioxide
C. pump blood throughout the body
D. makes the body hungry
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Which system enables the body to move, moves food through the digestive system, and keeps the heart beating?
A. skeletal
B. muscular
C. digestive
D. nervous
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