Question

Give one word for the following:
Physical process in which exchange of gases takes place.

Answer 1

Breathing:

1. The process, by which air is drawn in from the atmosphere into the lungs and forced out from the lungs back into the atmosphere is known as breathing.
2. It involves two steps-inhalation and exhalation.
3. Inhalation or inspiration involves the taking of atmospheric air into the lungs whereas exhalation involves the expulsion of air from the lungs into the atmosphere.

Final answer:

The physical process in which the exchange of gases takes place is breathing.