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part of respiratory system that consists only of the passages that serve airflow |
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1. ventilation of lungs 2. exchange of gases between air and blood and between blood and tissue fluid 3. use of oxygen in cellular metabolism |
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consists of alveoli and other gas-exchange regions |
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airway from nose to larynx (head and neck) |
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airway from trachea to lungs |
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- cleanses inhaled air - detects odor -resonating chamber that amplifies voice |
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block inhalation of large particles |
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divides nasal cavity into right and left chambers called nasal fossae |
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separates nasal cavity from oral cavity and allows you to breathe with food in your mouth |
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secretes layer of mucus that traps inhaled particles |
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muscular funnel extending from choanae to larynx |
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posterior to choanae and dorsal to soft palate - receives auditory tubes from middle ear and houses pharyngeal tonsil -only passes air |
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between soft palate and roof of tongue - contains palatine and lingual tonsils - -passes air, food and drink |
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opening of oral cavity into the pharynx |
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begins with union of nasopharyns and oropharynx - esophagus begins here -passes air, food and drink |
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voicebox; cartilage chamber that keeps food and drink out of airway and also produces sound
-during swallowing, muscles move larynx upward while tongue moves epiglottis downward to meet it so epiglottis directs food into esophageal dorsal to airway |
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opening of larynx and is guarded by flap of tissue called epiglottis |
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-located relatively high and allows them to breathe while swallowing -by age 2, muscle of tongue pushes it lower |
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most superior muscle in larynx, supportive plate in epiglottis |
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largest muscle in larynx, top part is "adam's apple" or laryngeal prominence. testosterone stimulates growth of prominence |
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muscle in larynx that connects larynx to trachea |
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pair of muscles in larynx, posterior to thyroid - function in speech |
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pair of muscles in larynx that attach to arytenoid - function in speech |
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pair of muscles in larynx |
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Intrinsic muscles of larynx |
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operate vocal cords by pulling on corniculate and arytenoid cartilages - sounds formed into words by pharynx, oral cavity,tongue and lips |
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extrinsic muscles of larynx |
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connect larynx to hyoid bone and elevates larynx during swallowing |
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vestibular folds of larynx |
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closes glottis during swallowing |
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vocal cords (vocal folds) of larynx |
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produce sound when air passes between them |
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-"windpipe" anterior to esophagus -supported by C rings of hyaline cartilage that keeps it from collapsing when you inhale - at inferior end, branches into right and left primary bronchi which supply the lungs |
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smooth muscle in gap of C rings that contracts to adjust tracheal airflow |
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