Question

Define vital capacity. What is its significance?

Answer 1

Here is your answer mate ,
Vital capacity is the maximum volume of air that can be exhaled after a maximum inspiration. It is about 3.5 – 4.5 litres in the human body. It promotes the act of supplying fresh air and getting rid of foul air, thereby increasing the gaseous exchange between the tissues and the environment.

Answer 2

Dear Student,

◆ Vital capacity -

• Maximum volume of air exhaled by lungs after forced inspiration is called vital capacity.
• Normally vital capacity is 4800 ml.
• Vital capacity is equal to sum of inspiratory reserve volume, tidal volume and expiratory reserve volume.

# Significance of vital capacity -

• Vital capacity is reduced in restrictive disorders but preserved in obstructive disorders.
• Vital capacity varies with gender, age and built of person.
• Measurement of vital capacity helps in diagnosis and prognosis of respiratory disorder.

Thanks dear. Hope this helps you...