The respiratory system plays a vital role in exchanging carbon dioxide and oxygen from the atmosphere and to the blood. This system divides into two parts, namely lower and upper respiratory system. The upper respiratory system comprise of the nasal cavity, nose, and the pharynx. The lower respiratory system has the trachea, bronchi, larynx, bronchioles, and air sacs of the lungs.

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Chapter 22, Problem 2MC

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The respiratory system plays a vital role in exchanging carbon dioxide and oxygen from the atmosphere and to the blood. This system divides into two parts, namely lower and upper respiratory system. The upper respiratory system comprise of the nasal cavity, nose, and the pharynx. The lower respiratory system has the trachea, bronchi, larynx, bronchioles, and air sacs of the lungs.

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