upper respiratory tract

noun

Medical Definition of upper respiratory tract

: the part of the respiratory system including the nose, nasal passages, and nasopharynx — compare lower respiratory tract

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“Upper respiratory tract.” The Merriam-Webster.com Medical Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/medical/upper%20respiratory%20tract. Accessed 6 December 2019.

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