A&P 14

A&P 14 - Chapter 14: Respiratory System Chapter...

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Chapter 14: Respiratory System Chapter 14: Respiratory System Major function is gas exchange Works with the cardiovascular system to accomplish: Breathing External respiration Internal respiration Transport of gases
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The Respiratory System The Respiratory System The Respiratory Tract Nasal hairs, cilia, and mucus cleanse inhaled air Lysozyme in the mucus help kill bacteria Mucociliary escalator Inhaled air is warmed by superficial blood vessels lining the airways Air is moistened by the mucous membrane The Nose The only external portion of the respiratory system Contains two nasal cavities Lined by a mucous membrane Nasal conchae increase the surface area for moistening and warming inhaled air Odor receptors located in the olfactory epithelium
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The Respiratory System The Respiratory System The Pharynx (the “throat”) Connects the nasal and oral cavities to the larynx Three parts: Nasopharynx Oropharynx Laryngopharynx Tonsils provide the primary lymphatic tissue defense for breathing The air passage and the food passage cross The Larynx Passageway for air between the pharynx and trachea Houses the vocal cords The epiglottis prevents food from entering the larynx
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The Respiratory System The Respiratory System The Trachea (the windpipe) Connect the larynx to the primary bronchi Ventral to esophagus C-shaped cartilaginous rings Mucosal lining has pseudostratified ciliated columnar epithelium that form the mucociliary escalator The Bronchial Tree The trachea divides into the right and left primary bronchi The primary bronchi branch into secondary bronchi Three for the right lung Two for the left lung The secondary bronchi divide into tertiary bronchi Bronchioles are the smallest conducting airways
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This note was uploaded on 11/26/2011 for the course PHY 220 taught by Professor Thomas during the Summer '10 term at N.C. State.

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A&P 14 - Chapter 14: Respiratory System Chapter...

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