The respiratory tract extends from the nose to the alveoli of the lungs. The lung is the principle organ of respiration. The main function of the bronchus is the exchange of gases such as oxygen (O 2 ) and carbon dioxide (CO 2 ). Gaseous exchange is a process of the respiratory system where gases such as O 2 and CO 2 get exchanged between the lungs and the blood. O 2 is an important gas that is used by the tissues for metabolism , but the level of CO 2 in the blood is essential for acid base homeostasis.

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Chapter 22, Problem 6WWTS

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The respiratory tract extends from the nose to the alveoli of the lungs. The lung is the principle organ of respiration. The main function of the bronchus is the exchange of gases such as oxygen (O₂) and carbon dioxide (CO₂). Gaseous exchange is a process of the respiratory system where gases such as O₂ and CO₂get exchanged between the lungs and the blood. O₂ is an important gas that is used by the tissues for metabolism, but the level of CO₂in the blood is essential for acid base homeostasis.

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