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Primary functions of respiratory system

gas transport and exchange

What organs make up the upper respiratory tract?

Nose and pharnynx

What organs make up the lower respiratory tract?

Layrnx, trachea, bronchi, and lungs

Function of nose

moisten air, filter air, provide respiratory pathway

Also known as opening of nose


What does respiratory mucosa consist of?

Stuff that helps destory bacteria, psuedostratified clolumnar cells

Function of nasal muscoa and inferior conchae

increase mucosal surface exposed to air, heat and moisten air

What are the three regions of the pharynx

naso, oro, and laryngo

these serve as a common passageway for food and air

oro and laryngo pharynx

what are the functions of the layrnx

voice production, air passageway, switch from air to food

when is the larynx closed?

during valsava's maneuver, coughing, and sneezing

Intermitten relase of expired air while opening and closing the glottis


Determined by length and tension of vocal cords


Depends on the force in which air rushes across vocal cords


Indentation that accomodates the heart in lungs

cardiac notch

Which type of alveolar cells make surfactant

type II

which type of alveolar cells are the main sites of gas exchange

type I

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