What are the three bony projections that arise from the lateral walls of the nasal cavity that en-hance filtration and humidification?
a. Alar nasi
b. Frontal sinuses
c. Palatine tonsils
d. Turbinates
ANS: D
Three shelflike bones protrude into the cavity from the lateral walls. These bony shelves are called the superior, middle, and inferior concha or turbinates. The concha functions to increase the surface area of the nasal cavity, which enhances filtration and humidification.
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