Question

how breathing mechanism takes place

Answer 1

Mechanism of Breathing. The breathing process takes place with the help of various respiratory organs, which form the part of our respiratory system. As we breathe in, we inhale air through our nostrils, which then passes through the nasal cavity, from where the oxygen-rich air reaches our lungs via the windpipe.
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Answer 2

The mechanics of breathing.The action of breathing in and out is due to changes of pressure within the thorax,in comparison with the outside.This action is also known as external respiration.When we inhale the intercoastal muscles and diphragm contract to expand the chest cavaty.