which of these is the work of the respiratory system
A. gas exchange between the external environment and the body circulatory system
B. particle holding up the body and giving it support and shade
C. breaking down food four it to be used by the body
D. transport system of the body
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Answer:
A. gas exchange between the external environment and the body circulatory system
Explanation:
ANSWER
which of these is the work of the respiratory system?
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