Biology of Humans 6th Edition by Judith Goodenough,Betty McGuire

تمرين 6

Choose the correct statement:
A) Cartilage rings keep the alveoli open.
B) The temperature and humidity of the air are adjusted as the air flows through the nasal cavities.
C) The larynx changes shape as we speak, creating resonance chambers of different sizes.
D) The center of each lung contains a large hollow area in which most of the gas exchange occurs.