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  2. Antelope Canyon - Wikipedia

    en.wikipedia.org/wiki/Antelope_Canyon

    Navajo Upper Antelope Canyon is a slot canyon in the American Southwest, on Navajo land east of Lechee, Arizona.It includes six separate, scenic slot canyon sections on the Navajo Reservation, referred to as Upper Antelope Canyon (or The Crack), Rattle Snake Canyon, Owl Canyon, Mountain Sheep Canyon, Canyon X [4] and Lower Antelope Canyon (or The Corkscrew). [2]

  3. Respiratory tract - Wikipedia

    en.wikipedia.org/wiki/Respiratory_tract

    The lower airways or lower respiratory tract includes the portion of the larynx below the vocal folds, trachea, bronchi and bronchioles. The lungs can be included in the lower respiratory tract or as separate entity and include the respiratory bronchioles, alveolar ducts, alveolar sacs, and alveoli. [3] Adult and pediatric airway anatomy

  4. Slot canyon - Wikipedia

    en.wikipedia.org/wiki/Slot_canyon

    A beam of sunlight in Upper Antelope Canyon. A slot canyon is a long, narrow channel or drainageway with sheer rock walls that are typically eroded into either sandstone or other sedimentary rock. A slot canyon has depth-to-width ratios that typically exceed 10:1 over most of its length and can approach 100:1.

  5. Airway tone - Wikipedia

    en.wikipedia.org/wiki/Airway_tone

    Airway tone is a key determinant of lung function and the presence of respiratory symptoms in obstructive lung diseases such as asthma, where baseline airway tone is elevated. [2] The upper extreme of the spectrum of airway tone represents bronchoconstriction, wherein the airway smooth muscles are significantly contracted, while the lower ...

  6. Mucociliary clearance - Wikipedia

    en.wikipedia.org/wiki/Mucociliary_clearance

    Mucociliary clearance (MCC), mucociliary transport, or the mucociliary escalator describes the self-clearing mechanism of the airways in the respiratory system. [1] It is one of the two protective processes for the lungs in removing inhaled particles including pathogens before they can reach the delicate tissue of the lungs.

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