Differentiate between:
(i) Inhalation and Exhalation

Inhalation

Exhalation

1. It is the process of taking air into the lungs.

1. It is the process of giving out the air from the lungs.

2. The external intercostal muscles contract, raising the ribs forward and upwards.

2. The internal intercostal muscles contract and the ribs take their normal position.

3. The muscles of the diaphragm contract and make it straight.

3. The muscles of the diaphragm relax and it comes to its original dome shaped position.

4. The abdominal muscles relax and allow compression of the abdominal organs.

4. The abdominal muscles contract and the diaphragm pushes upward.