Question

explain the process of breathing in human beings

Answer 1

 Breathing in human involves three steps: (i) Inspiration When we breathe in, ribs move up and flatten the diaphragm due to which the chest cavity becomes larger. As a result air is sucked into the lungs and fills the expanded alveoli. (ii) Gaseous exchange Haemoglobin binds with the oxygen and ...

Answer 2

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• The breathing in human beings takes place through the organs called lungs. The taking in of air rich in oxygen into the body during breathing is called 'inhalation' and giving out (or expelling) the air rich in carbon dioxide is called 'exhalation'. Both, inhalation and exhalation take place regularly during breathing.