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.
Sign language. It uses only signs made with your hands. You do not have to hear to understand it.
Answer:
Donna know hjjjjjjjjjj
Error
Rrrr
false
Explanation:
washing your hands................................