Answer:
Listen to pronunciation. (al-VEE-oh-ly) Tiny air sacs at the end of the bronchioles (tiny branches of air tubes in the lungs). The alveoli are where the lungs and the blood exchange oxygen and carbon dioxide during the process of breathing in and breathing out.
Answer:
to maintain internal balance
Explanation:
Answer:
then landscape would rarely happens and the there will be a lot of rocks smooth surface
Explanation:i really don't know