Question

The movement of ribs and diaphragm plays an important role in the breathing process.

• A. True
• B. False

Answer 1

The correct option is A True

Inhalation:

1. When we inhale air, our ribs moves upwards and outwards as the muscles in the rib cage contracts.
2. At the same time diaphragm becomes flat and moves downward due to contraction.
3. This expands the rib cage, increasing its volume. As the volume of chest cavity increases the air pressure in it decreases, and as a result air is drawn into the lungs.

Exhalation:

1. When we exhale air, the ribs moves downwards and inwards as the muscles in the rib cage relax.
2. And the diaphragm muscles relax and moves upwards.
3. Thus, the space inside the lungs decreases. The air pressure increases and as a result, air rich in carbon dioxide rushes out.

Final answer: The given statement is true.