notes 6 - Respiratory System Includes the passage that...

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Respiratory System - Includes the passage that transport air to & from the lungs & the air sacs, in which gas exchanges occur Respiration : is the entire process by which gases are exchanged b/w the atmosphere & body cells [TOP TO BOTTOM… IN ORDER] I. Nose Nasal Cavity: Functions to filter, warms, & moistens the incoming air - Happens in inspiration Sinuses : Spaces in the bones of the skull - Potential places for infection, allergic reactions Pharynx : It functions as a common passage for air & food Larynx : Contains the vocal cords - Glottis & epiglottis help prevent foods & liquid from entering the trachea [food passage way] Trachea : Extends into the thoracic cavity in front of the esophagus - Has empty space; non collapsible Bronchi: Major divisions of trachea that enter the lungs Bronchial tree : Consists of branched air passage that lead from the trachea to the air sacs [into lungs] Lungs : cone-shaped organs; R has 3 lobes & L has 2 lobes [b/c heart on L side] Alveoli : 300 million air sacs
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