Explain the role of the diaphragm in the process of breathing

cbse
cbse-class-7-science
respiration-organism

#1

Explain the role of the diaphragm in the process of breathing.

Answer:

When diaphragm contracts and moves downwards, the chest cavity enlarges and the pressure in lungs decreases. The air is breathed in to equalise pressure. When diaphragm relaxes and moves upwards, the lungs push out the air.