Question

Explain the mechanism of inhalation

Answer 1

1. Diaphragm muscles contract and flattens out 2. Volume of thoracic cavity increases 3. Air pressure inside thoracic cavity decreases 4. Air flow into lung 5. Ribcage move forward and upward

Answer 2

Mechanism of inhalation:-

• the ribs are raised upwards and outwards by the contraction of muscles and the diaphragm moves down (flattens).
• the volume of thoracic cavity and lungs increases and the air pressure inside the lungs decreases.
• air from the atmosphere having higher pressure rushes into lungs through nostrils and air passages and the lungs get filled with fresh air.