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?

Give suitable explanations for the following:(a) Breathing through the

1.	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?
Answer» 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?