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receptor in the aorti arch sensitive to oxygen content, carbon dioxide content, and blood
specialized structure on the face that serves as the sense organ of smell and as a part of the respiratory system
one of several air-filled cavities in the maxillary, frontal, sphenoid, and ethmoid bones that is lines with mucous membrane and drains into the nasal cavity
agent that reduces the surface tension of water; in lungs, prevents the alveoli from collapsing
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