Give suitable explanations for the following:

Why does gaseous exchange continue in the lungs even during expiration?

Q. Give suitable explanations for the following:
(a) Breathing through the nose is said to be healthier than through the mouth.
(b) Why does gaseous exchange continue in the lungs even during expiration?
(c) Why does a person feel breathlessness at higher altitudes?
(d) Why do you shiver and why do your teeth chatter when it is very cold in winter?

Q. Short / long answer type questions.
Gaseous exchanges continue in lungs without interruption even during expiration. Explain.

Q. State whether the following statements are true or false.
Gas exchanges continue uninterrupted in lungs even after a forceful expiration.

Q. Fill in the following blanks with suitable words :
(c) ………………in the lungs provides a very large surface area for gaseous exchange.

Q.

What happens during gaseous exchange in the lungs?