NCERT Solutions Class 11 Biology Chapter 17 – Download PDF

NCERT solutions for class 11 Biology chapter 17 Breathing and exchange of gases comprise of all the solved question of class 11 Biology NCERT BOOKS together with exemplary questions, HOTS and worksheets for your practice 3. Those students who find difficulties in understanding and learning the terminology of this topic can refer to these NCERT solutions as every concept are explained in a simple language to help students to understand and learn easily and effectively. These study materials are prepared by a team of our subject experts and are mainly framed as per the updated CBSE curriculum (2018-2019).

Breathing and exchange of gases take place in all living organisms. In this process, the respiratory system of an organism plays an important role. All organisms, from single bacterial cell to a blue whale undergo respiration and it is an essential process for the survival of an organism. Breathing is a physical process in which the oxygen gas is inhaled and carbon dioxide gas is exhaled out. Like, animals and humans, plants also carry out the process of exchange of gases to balance the composition of air in the atmosphere.

During the day, plants releases oxygen as a by-product of Photosynthesis and animals, birds and humans use this oxygen for breathing and releases carbon dioxide. These carbon dioxides are used by all green plants to synthesise food during the day in the presence of sunlight. Therefore both the Breathing and Exchange of Gases play a very important role in balancing the abiotic components of the ecosystem.

Parts of Chapter 17 Breathing and Exchange of Gases are:

1. Respiratory Organs
   1. Human Respiratory System
2. Mechanism of Breathing
   1. Respiratory Volumes and Capacities
3. Exchange of Gases
4. Transport of Gases
   1. Transport of Oxygen
   2. Transport of Carbon dioxide
5. Regulation of Respiration
6. Disorders of the Respiratory System.

In humans, respiratory organs play an important role in Breathing and Exchange of Gases. The specialized respiratory organs include Nasal Cavity, Pharynx, Larynx, Trachea, Lungs, Bronchi, and Bronchioles.