ANATOMY

Detailed explanation-1: -Breathing is a part of the process of respiration during which an organism takes in the oxygen-rich air and gives out air rich in carbon dioxide. The respiratory organs for the exchange of gases vary in different organisms.

Detailed explanation-2: -The lungs and respiratory system allow us to breathe. They bring oxygen into our bodies (called inspiration, or inhalation) and send carbon dioxide out (called expiration, or exhalation). This exchange of oxygen and carbon dioxide is called respiration.

Detailed explanation-3: -Respiration is not breathing. That is called ventilation . Respiration is a chemical reaction which occurs in every one of the cells in the human body. It releases energy stored in glucose and without it, these cells would die.

Detailed explanation-4: -Respiration and breathing are not synonymous. Q. Breathing can be controlled whereas respiration cannot be controlled by us.

Detailed explanation-5: -(i) during inhalation, ribs move inward and diaphragm is raised. (ii) the gaseous exchange takes place in the alveoli. (iii) haemoglobin has greater affinity for carbon dioxide than oxygen. (iv) alveoli increase surface area for the exchange of gases.