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The respiratory system - Part 1: nose, pharynx and larynx

This series looks at the structure and function of the respiratory system and describes the mechanics of breathing. Each of the cells in the body needs a supply of oxygen in order to function as well as a means to expel the carbon dioxide produced. The respiratory system (along with the cardiovascular system) is largely dedicated to supplying these needs. This article, the first in this four-part series, looks at the nose, pharynx and larynx (Fig 1).

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