Question

1) List three characteristics of lungs which make them an efficient respiratory surface

Answer 1

1) Lungs convert the impure blood from pure.
2) They keep residual volume of air in them so that we can get time for O2

Answer 2

1) Thin and moist membrane of the lungs.
2)Large surface area due to alveoli in the lungs.
3)Rich flow of red blood corpuscles helps in easy diffusion of the oxygen into the blood.