WEBVTT

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The major passages and structures of

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the upper respiratory tract include the

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mouth , nose nasal cavities , para

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nasal sinuses , pharynx and larynx dr .

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Mansfield . Can you tell us about this

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part of the respiratory system ?

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Absolutely dr . Green air enters the

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body through the nose and mouth . When

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a person inhales structures within the

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nose and mouth filter the incoming air

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by trapping particles that would

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otherwise cause illness or irritation

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of the respiratory tract . Nasal hairs

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at the opening of the nostrils trap

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larger particles . Smaller particles

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such as pollen or smoke are trapped by

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mucus , secreted by the mucus membrane

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that lines the entire respiratory

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system . Hair like structures called

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cilia . Move these particles out of the

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nose from the nose , inhaled air enters

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the nasal cavity . The tissue that

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lines the nasal cavity called the nasal

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epithelium , moistened warms and

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further cleanses the inhaled air nasal

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turbinate . It's or nasal Conkey , our

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finger like projections inside the

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nasal cavity that increase the surface

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area for warming and moistening inhaled

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air . The nasal septum is a partition

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made of cartilage and bone that

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separates the nasal cavity into the

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left and right nostrils . The nasal

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cavity is surrounded by the airfield

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chambers called para nasal sinuses .

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These sinuses are named for the bones

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in which they are located , frontal ,

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maxillary eth Boyd and solenoid . The

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para nasal sinuses reduce the weight of

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the skull produce mucus and influence

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voice quality by acting as resonating

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chambers . After the nasal cavity ,

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inhaled air passes through the pharynx

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or throat , the pharynx is a muscular

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funnel shaped tube that contains the

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tonsils and adenoids , the tonsils and

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adenoids released white blood cells

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that fight infection . Finally , the

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larynx , or voice box forms the

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entrance to the lower respiratory

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system . A leaf shaped flap called the

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epiglottis keeps food and liquid from

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entering the larynx during swallowing

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in order to produce sound to speak or

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sing . Two pairs of strong connective

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tissue bands called the vocal cords

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close together and air from the lungs

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passing between them causes them to

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vibrate