Chapter 22 The Respiratory System

Chapter 22 The Respiratory System - – Humid Conducting...

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8/16/2010 1 Respiratory System Chapter 22 Importance of respiration Breathing basics 15 breaths/minute 6 liters/minute – Exercise: 100 liters/minute Critical times – 4-5 minutes: unconscious – 7-8 minutes: brain damage – 10 minutes: death Early scientific ideas – Important invisible fluid Pneuma – Intangible life force Respiration defined Pulmonary ventilation* – Breathing External respiration* – Gas exchange: air/blood Transport of respiratory gases – Cardiovascular system Internal respiration – Gas exchange: blood/cells Functions of the respiratory system Gas exchange –O 2 2 out Sound production Assistance in abdominal compression Reflexive breathing Basic structure Functional divisions Conducting zone – All structures that deliver air to the alveoli Respiratory zone – Pulmonary alveoli Conducting zone Transport air to the respiratory structures of the lungs –Warm
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Unformatted text preview: – Humid Conducting zone Conducting zone Special structures of the nasopharynx uvula Conducting zone Sound production Conducting zone Conducting zone 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 8/16/2010 2 Conducting zone Asthma 34.1 million Americans – 4.8 million children 3,400 deaths/year Little cartilage in bronchioles – Smooth muscle Spasms 14.7 Billion $ Respiratory zone Alveolar cells (Type I & II) Lungs Lung disease Lung Disease: the real story Mechanics of ventilation Ventilation – Inspiration & Expiration Pressure gradient Mechanics of ventilation Respiratory volumes Tidal volume – Air in and out of lungs in quiet breathing – 500ml Respiratory volumes Respiratory volumes Nonrespiratory air movements Not associated with pulmonary ventilation – Coughing – Sneezing – Sighing – Yawning – Laughing – Crying – Hiccupping 17 18 19 20 21 22 23 24 25 26 27 28 29...
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This note was uploaded on 08/05/2011 for the course APK 2100 taught by Professor Dr.tillman during the Summer '07 term at University of Florida.

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Chapter 22 The Respiratory System - – Humid Conducting...

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