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The respiratory systems main function is gaseous exchange - oxygen in and carbon dioxide out.

The lungs take in oxygen which goes into the bloodstream which is needed to keep you alive and at the same time the lungs expel the carbon dioxide and water vapour which are not needed in the body.

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15y ago
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5mo ago

The chief function of the respiratory system is to facilitate the exchange of oxygen and carbon dioxide between the body and the environment. This is achieved through breathing, where oxygen is taken in and carbon dioxide is expelled. The respiratory system also helps regulate the body's pH balance and supports the sense of smell.

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13y ago

The major responsibilities are breathing in oxygen so you can live, and breathing out carbon dioxide.

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14y ago

to supply blood with oxygen

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Q: What are the chief function of the respiratory system?
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