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Inspiration:
Inhalation of air
Chest move upwards
Diaphragram becomes straight
Surface area of lung increases
Air pressure reduces
Expiration:
Exhalation of air
Chest move downwards
Diaphragram becomes back to concave shape
Surface area of lung decreases
Air pressure increases
Heart beat:
It is the contraction and relaxation of heart
Blood Transfusion:
It is the transfer of blood from one body to another if there is a loss of blood due to some injury.