Mammalian lungs contain an enormous number of minute alveoli (air sacs). This is to allow
A. more space for increasing the total volume of inspired air
B. more surface area for diffusion of gases
C. more spongy texture for keeping lungs in proper shape
D. more nerve supply to keep the organs working more efficiently
Answer:A
Mammalian lungs contain an enormous number of minute alveoli (air sacs). This is to allow
A. more space for increasing the total volume of inspired air B. more surface area for diffusion of gases C. more spongy texture for keeping lungs in proper shape D. more nerve supply to keep the organs working more efficiently