What structures does a molecule of oxygen encounter on its way to the alveoli of the lungs from the nose? Trace the pathway
What will be an ideal response?
Air first encounters the nose by entering through the nares. It travels by the nasal conchae of the nasal cavity, then to the nasopharynx, oropharynx and laryngopharynx. The next structure, the larynx, routes air into the lower respiratory passageways and food into the posterior tube, the esophagus. Air travels through the glottis into the windpipe, or trachea, and into the smaller branches, finally reaching the smallest passageways known as bronchioles. The terminal bronchioles end in alveoli, small air sacs, where gas exchange is occurring.
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Fill in the blank(s) with the appropriate word(s).
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Answer the following statement true (T) or false (F)
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