★ Body System Quiz
What is the biggest function of the respiratory system?
A. to pump blood
B. to help us digest food
C. to take in oxygen and release carbon dioxide
D. to help us fight disease and infection
Preview next quiz:
What system is the body’s way of fighting off pathogens that would make it sick?
A. Excretory
B. Immune
C. Digestive
D. Endocrine
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