Osteoporosis is the correct answer I think
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: D. sharing them with others.
Explanation:
Hope this helps!
Answer:
he was probably overwhelmed by exercising
Explanation: