Chapter 16,17 - Chapter 16+17 - Respiration O2 and CO2...

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1 O 2 and CO 2 transport & acid-base Physical aspects of ventilation and transport 1. Ventilation = mechanics of breathing 2. Gas Exchange – lungs to capillaries to tissues 3. Oxygen Utilization aerobic derivation of ATP Chapter 16+17 - Respiration • The trachea, bronchi, and bronchioles constitute the conducting zone . • The region of where gas exchange with the blood occurs is known as the respiratory zone . Chapter 16 – Breathing Mechanics Thoracic Cavity • The structures of the thoracic cavity are covered by thin, wet parietal pleural membranes. • The lungs are covered by a visceral pleura that is normally flush against the parietal pleura that lines the chest wall. • The potential space between the two pleural membranes is called the intrapleural space .
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2 Conducting Zone Serves to warm, humidify, and filter the air. Temp. of inspired air when it reaches respiratory zone is 37°C. Saturated with water vapor. Mucus is secreted by the goblet cells Mucus is moved at the rate of 1 to 2 cm/ minute by cilia projecting from tops of epithelial cells. Respiratory Zone • Alveoli provide large surface area for diffusion of gases. • Blood-gas barrier is only two cells thick, aids in diffusion • Fragile cells- excessive force causes them to collapse Surfactant and Respiratory Distress Syndrome (RDS) Called surfactant (surface active agent).
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This note was uploaded on 08/05/2011 for the course APK 2105 taught by Professor Brooks during the Summer '07 term at University of Florida.

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Chapter 16,17 - Chapter 16+17 - Respiration O2 and CO2...

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