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Blood circulation occur :)
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duh??? iwant more answer.
i want more answers.
when you inhale or breathe, the diaphragm moves down and expand. the ribs moves up and it increase the size of the chest cavity and then there would be more space and less air pressure in the lungs. so it means the diaphragm muscle contracts.
when you breathe out or exhale, the diaphragm goes back to its original place. there is now a higher air pressure inside the lungs and the chest goes back to its original size. in short it means the muscles are relaxed
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The oxygen will go inside the lungs and the oxygen gives energy to our body and it will give oxygen in the blood
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