In the nervous system which works on various organs in the body that control blood pressure , heart rate , liver functions etc
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Answer:
The smallest bronchioles end in tiny air sacs, called alveoli. They inflate when a person inhales and deflate when a person exhales. During gas exchange oxygen moves from the lungs to the bloodstream.
Explanation:
Answer:
due to human are using resources faster than they can be renewed replace and clean up.
