Chapter Chosen

Breathing and Exchange of Gases

Book Chosen


Subject Chosen


Book Store

Download books and chapters from book store.
Currently only available for.
CBSE Gujarat Board Haryana Board

Previous Year Papers

Download the PDF Question Papers Free for off line practice and view the Solutions online.
Currently only available for.
Class 10 Class 12
Explain the different types of pulmonary volumes.

Different types of pulmonary volumes.

1. Tidal volume : It is the air normally inspired or expired. It is approx 500 ml.

2. Inspired reserve volume : It is the additional volume of air inspired with maximum possible effort after normal inspiration. It is approximately 2500 ml.

3. Inspiratory capacity (I.C.) : It is the total amount of air a person can inspire after a normal expiration.  It is the sum of tidal volume and inspiratory reserve volume. 

4. Expired reserve volume (ERV) : It is the amount of air expired with maximum possible effort after normal expiration. It is 1100 ml.

5. Vital capacity : It is the maximumvolume of air a person can breathe in after forced expiration or the maximum amount of air a person can breathe out after forced inspiration. It is the sum total of tidal volume, inspired reserve volume and expired reserve volume.

6. Residual volume (RV): It is the amount of  air left in the lungs after forcible expiration. It is 1100–1200 ml.

7. Functional residual volume : It is the amount of air left in lungs after normal expiration. FRV = ERV +RV.

8. Total lung capacity : It is the amount of air in lungs and respiratory tract after maximum inhalation effort. It is equal to the sum of vital capacity and the residual volume.

Total lung capacity = Vital capacity + Residual volume

9. Dead space : It is the space which contains a part of inspired air during inspiration and a part of expired air during expiration. 


Oxygen is carried by haemoglobin as?


Name the cavity having lungs.

Thoracic cavity.

70% of carbondioxide is transported as ?


By what amount the solubility of carbondioxide is more than the solubility of oxygen?

20 - 25 times

What is the partial pressure of oxygen in  oxygenated blood ?

95 mm Hg