Question

29. State the role of the following in human respiratory system
(a) Diaphragm
(b) Alveoli
(c) Nasal hairs​

Answer 1

Answer:

(a) Diaphragm: It is a muscular partition between the thoracic and abdominal region in our body. Movement of diaphragm helps in the breathing process.

(b) Alveoli: These are balloon-like structures, which increases the surface area for the gaseous exchange in lungs.

(c) Nasal hairs: These are fine hairs present in the inner lining of the nasal passage. These hairs help in filtering the air passing through nostrils so that, germ free air could reach the lungs.