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Related to respiratory tract: respiratory tract infection, Lower respiratory tract infection, Upper respiratory tract infection
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|Noun||1.||respiratory tract - the passages through which air enters and leaves the body|
respiratory system, systema respiratorium - the system for taking in oxygen and giving off carbon dioxide; in terrestrial animals this is accomplished by breathing
lower respiratory tract - the bronchi and lungs
upper respiratory tract - the nose and throat and trachea
tract - a system of body parts that together serve some particular purpose