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A_RESP4C - Re spiratory S m yste Oxyge Availability Lim...

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1 Respiratory System Oxygen Availability Limits thePerformanceof Organs and Tissues - I.E. Your Performance . S. C. Williams San Francisco StateUniversity
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2 Introduction What is it? System of air ducts and gas exchange surfaces Conducting passageways : nose, pharynx, larynx, trachea, bronchi, bronchioles Absorptive surfaces : respiratory bronchioles, alveoli Alveolar-capillary membranes Crouch 1985
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3 Topics for Discussion Organs of respiration Functions of respiratory system Organs of respiration Alveolar-capillary membrane Breathing movements Respiratory air volumes
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4 Organs of Respiratory System Nose Nasal aperture and passage ways Nasopharynx Laryngeal pharynx Larynx Trachea Bronchi – primary, secondary and tertiary Bronchioles Alveolar sac and alveoli Alveolar capillary membranes Crouch 1985
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5 Functions Oxygen absorption & carbon dioxide excretion Vocalization Olfactory reception & orientation Processes air for quality Supports spinal column
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6 Physical Requirements of the Respiratory System Exchange surfaces must be thin & differentially permeable Exchange surfaces must be moist (gases carried through dissolved in water) Surfactant – reduces surface tension Extensive blood supply (capillaries) necessary Effective means for continually moving fresh air
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7 Upper Respiratory Structure & Function Nose -- external nares, vestibule, nasal cartilages, vestibular hairs Nasal aperture -- nasal septum, hard
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