Question

What is the vital capacity of lungs?

• A. Air breathed in and out in a normal quite breathing
• B. Air left in the respiratory passages such as trachea and bronchi
• C. The air that can be taken in and expelled out by maximum inspiration and expiration
• D. maximum air which can at any time be held in two lungs

Answer 1

The correct option is C

The air that can be taken in and expelled out by maximum inspiration and expiration

.Vital capacity is the volume of air that can be taken in and expelled out by maximum inspiration and expiration.

Air breathed in and out in a normal quite breathing - Tidal volume

Air left in the respiratory passages such as trachea and bronchi - Dead air space

Maximum air which can at any time be held in two lungs - Total lung capacity