Question

Identify the error(s) in the given statements.

During exhalation, ribs move upwards and outwards as the muscles relax.

Answer 1

Inhalation:

1. The entry of oxygen-rich air to the lungs through the nose is called inhalation.
2. Two things happen simultaneously during inhalation.

• Ribs move upwards and outwards due to the contraction of muscles in the ribcage and this movement increases the space in our chest cavity and the air rushes in.
• The diaphragm becomes flat and moves downwards.

Exhalation:

1. The process in which carbon dioxide-rich air rushes out from the air through nostrils is called exhalation.
2. Two things happen simultaneously during exhalation.

• Ribs move downwards and inwards as the muscles relax and this movement decreases the chest volume.
• The diaphragm relaxes and moves upwards.

Final answer: During exhalation. ribs move downwards and inwards as the muscles relax.