Final answer:
When air is moved into the body, it is filtered, warmed, and moistened to ensure it is clean and suitable for proper function.
Step-by-step explanation:
When air is moved into the body, it undergoes several changes. First, it is filtered by the nose and throat, which remove particles and debris from the air. Second, it is warmed as it passes through the nasal cavity, thanks to the rich blood supply in the nasal mucosa. Third, it is moistened by the moisture present in the nasal passage and respiratory tract. These three processes ensure that the air entering the body is clean, at the right temperature, and properly humidified for optimal function.
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