Answer:A
Explanation:These are called Alveoli.They inflate when a person inhales and deflates when a person exhales. During gas exchange oxygen moves from the lungs to the bloodstream. At the same time carbon dioxide passes from the blood to the lungs.
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Answer:
Psychology today describes dependency as "a disorder that may arise if a person uses or participates in a gambling, shopping or spending drug like smoking, cocaine, or alcohol.
Explanation:
It should be C heart and blood vessels