Mammalian lungs have an enormous number of minute alveoli (air sacs). This is to allow__________
A. More space for increasing the 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 lungs working
Answer:B
Mammalian lungs have an enormous number of minute alveoli (air sacs). This is to allow__________
A. More space for increasing the 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 lungs working