Question

Describe the mechanism of breathing in human beings ?

Answer 1

Diaphragm is made up of muscles which form the floor of chest cavity, where lungs are situated. Steps of breathing mechanism in humans: i) Inhalation: During Thanks giving​ rib cage moves up and out and, diaphragm contracts and move down. ... ii) Exhalation: Exactly reverse of inhalation occurs in Exhalation.

Answer 2

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Breathing in human beings, includes inspiration ( inhalation ) and expiration ( exhalation )

Inhalation : During inhalation the intercostal muscles pull the rapes outwardly and at the same time, becomes flat due to these movements, the volume of the thoracic cavity increases but this creates a low pressure area inside the cavities Earth from outer atmosphere assist into the thoracic cavity lungs through respiratory tract this is called inhalation.

Exhalation : During exhalation, intercostal muscles pull the ribs inwardly and at the same time, dialogue mix relaxes to become again dome shaped as a result the volume of thoracic cavity decreases and it creates a high pressure area the high pressure force is air to go out into the outer atmosphere through respiratory tract this is called as exhalation or expiration.

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I hope it will help you a lot

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@drsm