Breathing
Breathing
Breathing is a physical process that sends fresh air/water (rich in ) to respiratory organs and removes foul air/water (rich in carbon dioxide) from them.
Breathing : The process of taking in and giving out air for respiration is called breathing. Breathing involves two main steps, inhalation and exhalation. During inhalation, we breathe in air which is rich in oxygen. During exhalation, we breathe out air which is rich in carbon dioxide.
During inhalation chest cavity expands with the help of the thoracic muscles and during exhalation muscles relax ad their occur decrease in the size of thoracic cavity.
Rate of Breathing:
When we do normal activities, the rate of breathing is normal. The breathe rate of human beings is 15- 18 breaths a minute. The rate of breathing increases when we do strenuous physical works such as running, swimming, jogging, etc. The rate of breathing decreases when we take rest or when we are sleeping.
At high altitude, RBC of human blood will _________________ | |||
| Right Option : A | |||
| View Explanation | |||
Consider the following statement about inhaled air and exhaled air: (i) Exhaled air contains more carbon dioxide than inhaled air. (ii) Exhaled air is cooler than inhaled air. (iii) Inhaled air contains more moisture than exhaled air. (iv) Inhaled air contains more oxygen than exhaled air. Which of the above statements are correct? | |||
| Right Option : D | |||
| View Explanation | |||
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