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Which of the following structures are tubes?
A. Frontal, maxillary, sphenoidal, ethmoidal
B. Eustachian, pharynx, bronchi
C. Cilia, adenoids, mucous, epiglottis
D. Apex, base, hilum

  • health -

    And your choice is? You could look each word up in a dictionary to help decide.

    Sra

  • health -

    which of the following strutures are tubes?
    A. eustachain, pharynx, bronchi
    B. Frontal, Malillary, Sphenoidal, Ethmoidal
    C. Apex,base, Hilum
    D. Cilia, adenoids, mucous, epiglottis

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