1.Pulmonary ventilation ●Definition Principles of pulmonary ventilation Driving force Direct ~pressure changes in alveoli Source ~contraction of respiratory muscles Inspiratory muscles: Diaphragm,External intercostal muscle Expiratory muscles: Diaphragm,Ext-&Internal intercostals Accessory respiratory muscles§ 1. Pulmonary ventilation • Definition • Principles of pulmonary ventilation * Driving force Direct ~: pressure changes in alveoli Source ~: contraction of respiratory muscles Inspiratory muscles: Diaphragm, External intercostal muscle Expiratory muscles: Diaphragm, Ext- & Internal intercostals Accessory respiratory muscles