Whales are air-breathers but can live underwater for a long time because they possess:

Which of the following statements correctly describes the respiratory processes occurring in the lungs?

Which structure is not concerned with breathing in a frog?

The number of $RBCs$ in man increases if he lives at a higher altitude; this is because

Analogy type question:
$(1)$ Inspiratory Reserve Volume $(IRV)$: $2500$ to $3000 \ mL$ :: Inspiratory Capacity $(IC = TV + IRV)$: ........
$(2)$ $CO_2$ by hemoglobin: Carbamino-hemoglobin form :: Oxygen binds with hemoglobin: ........

Assertion: In mammals,a complex respiratory system has developed.
Reason: Mammalian skin is impermeable to gases.