5. What system is responsible for the exchange of oxygen and carbon dioxide between the
air and the cells?
a. Circulatory
b. Integumentary
c. Excretory
d. Respiratory
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Answer:
respiratory system
The lungs and respiratory system allow us to breathe. They bring oxygen into our bodies (called inspiration, or inhalation) and send carbon dioxide out (called expiration, or exhalation). This exchange of oxygen and carbon dioxide is called respiration.
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