ZOO3731_chptr25-26 (1)

ZOO3731_chptr25-26 (1) - The Respiratory System Pulmonary...

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Unformatted text preview: The Respiratory System Pulmonary ventilaton Pulmonary ventilaton-movement of air in and out of lungs;ventilation/breathing. External respiration External respiration-gas exchange between blood and alveolar sacs. Transport of respiratory gases Transport of respiratory gases- cardiovascular transport of oxygen/carbon dioxide between lungs and tissue cells. Internal respiration Internal respiration Functional Anatomy of the Respiratory System Organs Organs-Nose,nasal cavity,pharynx,larynx, trachea, bronchi,smaller branches, lungs,alveoli. Respiratory zone Respiratory zone-respiratory bronchioles,alveolar ducts,alveoli. Conducting zone Conducting zone-entrance, nasal cavity,bronchioles. The Nose and Paranasal Sinuses Nose provides Nose provides : airway, moistens/warms entering air,filters,speech resonating chamber,olfactory receptors. External nose External nose-nasal bones, maxillary bone, lateral cartilage,greater & lesser alar cartilages,external nares Nasal cavity Nasal cavity-septum(septal cartilage, perpendicular plate, vomer),conchae,meati, respiratory epithelium Paranasal sinuses Paranasal sinuses-frontal,sphenoid, ethmoid,maxillary. The Pharynx Connects nasal cavity and mouth to larynx and esophagus. Nasopharynx, oropharynx, and Nasopharynx, oropharynx, and laryngopharynx laryngopharynx Nasopharynx Nasopharynx-posterior to nasal cavity,inferior to sphenoid bone, superior to soft palate level;auditory tubes The Pharynx (contd) Oropharynx Oropharynx-lies posterior to oral cavity;extends from soft palate to esophagus; epithelium transitions from pseudostratified to strat. squamous; palatine, lingual tonsils Laryngopharynx Laryngopharynx-lies directly posterior to epiglottis and extends to larynx The Larynx Voice box extends 2 inches from C4-C6;attaches to hyoid bone superiorly Functions in providing patent airway and to route air and food into proper channels;voice production. Laryngeal framework Laryngeal framework-thyroid cart., laryngeal prominence,cricoid cart., arytenoid, corniculate,cuneiform,vestibular fold,vocal fold,epiglottis Laryngeal musculature Laryngeal musculature- extrinsic(stabilization);intrinsic(regulate vocal fold tension). The Trachea Descends from larynx into mediastinum 10-12 cm (4 inches) long,2.5cm diameter(1 inch) Tracheal walls Tracheal walls-mucosa, submucosa, adventitia Trachealis muscle Trachealis muscle Carina Carina The Bronchi and Subdivisions: The Bronchial Tree The Conducting Zone Right/left primary bronchi(extrapulmonary) Secondary(lobar),tertiary(segmental), terminal bronchioles Structural changes occur as bronchi diameter diminish:(1)cartilage rings replaced by irregular cartilaginous plates; (2)pseudostratified>columnar>cuboidal; and (3)smooth muscle increases. The Bronchial Tree The Respiratory Zone Terminal bronchioles feed into into respiratory bronchioles....
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This note was uploaded on 12/31/2011 for the course ZOO 3731 taught by Professor Staff during the Fall '08 term at FIU.

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ZOO3731_chptr25-26 (1) - The Respiratory System Pulmonary...

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