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2 July, 12:51

Air from the outside is:

a. warmed, dried and cleaned by the nose and mouth

b. cooled, dried and cleaned by the nose and mouth

c. cooled, moistened and cleaned by the nose and mouth

d. warmed, moistened and cleaned by the nose and mouth

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Answers (2)
  1. 2 July, 13:03
    0
    d. warmed, moistened and cleaned by the nose and mouth
  2. 2 July, 15:29
    0
    D.

    The air in the surroundings is at a lower temperature than the body so is warmed, the mucous in the nasal cavity moistens it and the hairs trap dust and pathogens.
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