What are the small sacs at the end of bronchioles where gas exchange occurs called?
1 Answer
Jun 27, 2017
Alveoli (singular: alveolus).
Explanation:
The tiny sacs at the end of the bronchioles are called alveoli.
These tiny sacs are surrounded by capillaries that connect the pulmonary arteries to the pulmonary veins.
Alveoli are extremely thin-walled and elastic sacs that permit the passage of oxygen from the inhaled air to the blood in the capillaries, as well as the passage of carbon dioxide from the blood back to the alveoli for exhalation.
