Assertion (A): The walls of the alveoli are extremely thin and made up of a single layer of squamous epithelium. Reason (R): This structural arrangement minimizes the diffusion distance for gases.
- ABoth A and R are true and R is the correct explanation of A
- BBoth A and R are true but R is NOT the correct explanation of A
- CA is true but R is false
- DA is false but R is true
✓ Correct answer: A
Want the full step-by-step reasoning?