Answer: It is the key to blocking infections
Explanation: I hope this is right :)
Girl what the hell are u on
Answer:
many alveoli are present in the lungs with a shape that further increases surface area. Thin walls - alveolar walls are one cell thick providing gases with a short diffusion distance. Moist walls - gases dissolve in the moisture helping them to pass across the gas exchange surface.
Explanation:
it would be 35 degrees if u could do brainliest for me please
