PATHOLOGY

Detailed explanation-1: -When you exercise and your muscles work harder, your body uses more oxygen and produces more carbon dioxide. To cope with this extra demand, your breathing has to increase from about 15 times a minute (12 litres of air) when you are resting, up to about 40–60 times a minute (100 litres of air) during exercise.

Detailed explanation-2: -Carbon dioxide induces vasodilation in the arteries while the heart rate increases, which leads to better blood flow and tissue perfusion, and better oxygen delivery to the tissues. In particular, the blood flow to the brain and heart is increased, while increased blood flow to the muscles makes exercise easier.

Detailed explanation-3: -Breathing rate is the number of times a person breathes in a minute. One full inhalation and one full exhalation is counted as a single breath. The number of breaths per minute is calculated for a person to obtain the breathing rate. The normal breathing rate for human beings during rest is 15 to 18 breaths per minute.