Q: Where in the lungs does gas exchange between the air and blood takes place?


Read this paragraph and choose the correct option from the provided answers:

The alveoli in the lungs are where gas exchange between the air and blood takes place. Each alveolus is surrounded by a network of capillaries. When you inhale, air in the alveoli has a greater concentration of oxygen than does blood in the capillaries. The difference in oxygen concentration causes oxygen to diffuse from the air into the blood. You can see how this occurs in Figure below .

 Choices:

- ganglion

- left lobe

- bronchial tube

- alveoli


A:
alveoli