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the upper respiratory tract consist of nostrils, nasal cavities, pharynx, and larynx.
nostrils-where it is filtered through the two openings of the nose
large dust and dirt particles-coarse hairs that are coated with mucus
the adult human body requirs around 90 pounds of oxygen per day to function normally
parynx-the warmed, moistened, and filtered air moves through a nuscular tube in your upper throat
the praynx is a common passageway for both food and air
it leads to two trachea leads to passageway the esophagus and the trachea.
the esophagus leads to the digestive system,while the trachea leads to the respiratory system.
epiglottis-is a flap of tissue that closes the entrance to the rest of the respiratory system when you swallow.
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