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some say the vocal cords (glottis) or others say a line of cartilage.

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Q: Where does the upper airway or upper respiratory tract end?
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Is pharynx part of the upper respiratory tract?

Yes they are. They are all connected by pesky tubes that can clog up at a moments notice and an infection in one can often end up as an infection in the other.


What connects the upper and lower respiratory systems?

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