CMD 276 Lecture Notes - Lecture 4: Transverse Abdominal Muscle, Pectoralis Minor Muscle, Alveolar Pressure
6 Mar 2017
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Cmd 276 - lecture 4 - speech as a process. Thoracic (heart and lungs) vertebrae 12. Cartilage and smooth muscle line posterior surface. 11 cm. long, 2. 5 cm. wide in adults. Gas exchange of oxygen and carbon dioxide. Visceral pleura membrane outside the lung. Parietal pleura membrane on the inner surface of the thorax. Negative pressure establishes unity of lungs-thorax unit. Provides a smooth, friction-free surface for movement. Some muscles participate fully in respiration, others facilitate the process. Air flows in the direction of lower pressure. States of equilibrium at the end of inhalation and end of exhalation. Contraction-relaxation forces hold each other in balance. Volume of air exchange during a specific task. Maximum amount of air remaining in lungs after maximum exhalation. Total amount of air available for life and speech. Total volume + expiratory reserve volume (erv) + inspiratory reserve volume (irv) About 5000 cc of vc in adults. Total amount of air lungs are capable of holding.
