-1Lungs Surface Anatomy (lobes)ŸLung disease 150,000 deaths/year in the US due to lungŸSmoking increases risk by 20% (or does it)ŸMechanics of ventilationŸVentilation (inspiration & expiration)ŸInspirationŸDiaphragm, external intercostalsŸScalene, SCMŸExpiration: ŸElasticity of lungsŸInternal intercostals, abdominal musclesŸPressure gradientŸRespiratory volumesŸTidal volumeŸAir in and out of lungs in quiet breathing (500mL)ŸVital capacity: ŸMaximum air that can be exhaled after a maximum inhalation (4500mL)Ÿ6L average (total amount of air that the lungs can hold)ŸNon-respiratory air movements (not associated with pulmonary ventilationŸCoughingŸSneezingŸSighingŸYawningŸLaughingŸCryingŸHiccupping ŸDigestive systemŸ(reading ch. 21: 582-600)Ÿ(reading ch. 22: 610-640)Ÿ(reading ch. 23: 648-664)ŸThe beginnings of gastroenterologyŸAlexis St. Martin shot through the stomach (81 years old & 20 children)
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Digestive System, Large intestine, reading ch, Pressure gradient Respiratory, Non-respiratory air movements