A person dies in an accident in which his chest cavity was punctured, but no lung damage was there. Point out the cause of death.

3

(a)

Diffusion of gases occurs in the alveolar region only and not in the other parts of respiratory system. Why?

3

(a)

Why is breathing of women regarded as thoracic, while that of male as abdominal? Also state who among the two has higher vital capacity.

3

(a)

State the route of foul air from the lungs to outside. Also state whether TV increases or decreases during excitement and activity.

3

(a)

Why is it not advisable to sleep in closed rooms warmed with burning of coals continuously?

3

(a)