human biology: - internal: the exchange of oxygen and carbon dioxide between the blood and the tissues that need it
- external: the movement of oxygen and carbon dioxide between the lungs and the bloodstream

Question

- internal: the exchange of oxygen and carbon dioxide between the blood and the tissues that need it
- external: the movement of oxygen and carbon dioxide between the lungs and the bloodstream

Abbey Man · Accepted Answer

internal and external respiration

human biology

- internal: the exchange of oxygen and carbon dioxide between the blood and the tissues that need it - external: the movement of oxygen and carbon dioxide between the lungs and the bloodstream

Internal and external respiration

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