The Respiratory System

The Respiratory - •Lines conducting portion of respiratory tract •Protected from contamination by respiratory defense system The Upper

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The Respiratory System The Respiratory System: An Introduction Functions of the respiratory system •Gas exchange between air and circulating blood •Moving air from the exchange surface of the lungs •Protection of respiratory surfaces •Production of sound •Provision for olfactory sensations Organization of the respiratory system •Upper respiratory system •Nose, nasal cavity, paranasal sinuses, pharynx •Lower respiratory system •Larynx, trachea, bronchi, bronchioles, alveoli The Respiratory tract •Conducting passageways carrying air to and from the alveoli •Upper respiratory passages filter and humidify incoming air •Lower passageways include delicate conduction passages and alveolar exchange surfaces Respiratory Mucosa •Respiratory epithelium and underlying connective tissue •Respiratory membrane, supported by lamina propria, changes along tract
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Unformatted text preview: •Lines conducting portion of respiratory tract •Protected from contamination by respiratory defense system The Upper Respiratory System The nose and nasal cavity consists of: •External nares •Nasal cavity •Vestibule •Superior, middle and inferior meatuses •Hard and soft palates •Internal nares •Nasal mucosa The pharynx •Shared by the digestive and respiratory systems •Divided into three sections: •Nasopharynx – superior portion •Oropharynx – continuous with the oral cavity •Laryngopharynx – between the hyoid bone and the esophagus The Larynx The larynx •Air passes through the glottis on the way to the lungs •Larynx protects the glottis •Cartilages of the larynx •Three large cartilages •Thyroid, cricoid, and epiglottis •Paired cartilages •Arytenoids, corniculate, and cuneiform...
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This note was uploaded on 11/22/2011 for the course BSC BSC1085 taught by Professor Sharonsimpson during the Fall '10 term at Broward College.

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The Respiratory - •Lines conducting portion of respiratory tract •Protected from contamination by respiratory defense system The Upper

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