Alveoli Adaptations

Question 1

Adaptation 1

Answer 1

Lungs have millions of alveoli which means large surface area.

Question 2

Adaptation 2

Answer 2

Alveoli have very thin walls so diffusion path is very short

Question 3

Adaptation 3

Answer 3

Alveoli have rapid blood supply. This means oxygenated blood is removed quickly. Therefore, the concentration gradient is as steep as possible which increases the rate of gas diffusion .