KINESIOL 1AA3 Lecture Notes - Lecture 8: Paranasal Sinuses, Nasal Cavity, Sphenoidal Sinus

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23. 2 anatomy and histology of the respiratory system upper respiratory tract: nasal cavity, pharynx, larynx (voicebox) Lower respiratory tract: trachea (windpipe), bronchi (smaller airways that move air down to smallest levels of tissues deep within lungs. Create turbulent flow of air as it moves through nasal cavity; air comes into contact with mucosal layer of nasal cavity function to humidify and warm incoming air. Superior, middle, inferior concha bony ridges, as air is brought up and passes over these sharp ridges, air becomes turbulent and contact with inner mucosal lining increases. Paranasal sinuses opening into nasal cavity, composed of frontal and sphenoidal sinus. Nasal cavity choana is distal portion where nasal cavity narrows and opens up into pharynx. Air comes in fron nasal cavity moves into throat via nasopharynx. Soft palate is muscle that closes off nasopharynx during swalling. Air will separate and move into trachea through the opening larynx.

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