呼吸肌 Muscles of inspiration diaphragm external intercostal muscles 吸气肌：膈肌和肋间外肌 Muscles of expiration internal intercostal muscles abdominal muscles 呼气肌：肋间内肌和腹肌
Muscles of inspiration : diaphragm external intercostal muscles 吸气肌：膈肌和肋间外肌 Muscles of expiration : internal intercostal muscles abdominal muscles 呼气肌：肋间内肌和腹肌 呼吸肌
肺通气的动力 Inspiration:inspiration muscles 呼气状态 contract thoraxes expand-lungs expand-intrapulmonary pressure decreases -gas enters lungs 吸气：吸气肌收缩一胸廓扩张一肺扩张一 肺内压下降一气体进入肺 隔在呼气运动和吸气运动中的位置 Expiration:diaphragm and external intercostal muscles relax-lung recoils-thorax recoils- intrapulmonary pressure increases-gas is removed. 呼气：膈肌和肋间外肌舒张一肺回缩一胸廓回缩一肺内 压升高一气体被呼出
Inspiration: inspiration muscles contract - thoraxes expand-lungs expand- intrapulmonary pressure decreases –gas enters lungs Expiration: diaphragm and external intercostal muscles relax-lung recoils-thorax recoilsintrapulmonary pressure increases-gas is removed. 吸气：吸气肌收缩－胸廓扩张－肺扩张－ 肺内压下降－气体进入肺 呼气：膈肌和肋间外肌舒张－肺回缩－胸廓回缩－肺内 压升高－气体被呼出 肺通气的动力
Intrapleural pressure胸内压 胸膜和胸膜腔 Pleural cavity胸膜腔 胸膜顶纵隔 胸膜脏层 The effect of liquid is (1)Lubrication effect 肋胸膜 在两层胸膜之间起润滑作用 脚膜 (2)The power between liquid 膈胸膜 隔肋宾 纵离 纵 纵隔胸膜 molecules pastes two layers of 胸序颜断面 胸扉横切面 pleura to make them tightly. 使两层胸膜贴附在一起，不易分开
Pleural cavity胸膜腔 Intrapleural pressure胸内压 The effect of liquid is : （1） Lubrication effect 在两层胸膜之间起润滑作用 （2） The power between liquid molecules pastes two layers of pleura to make them tightly. 使两层胸膜贴附在一起，不易分开
Intrapleural pressure胸内压 Intrapleural pressure is the pressure within pleural cavity 胸膜腔内的压力 胸内压是一个负压
胸内压是一个负压 Intrapleural pressure胸内压 Intrapleural pressure is the pressure within pleural cavity 胸膜腔内的压力
胸内负压的生理意义 1)Allow expansion of the lungs 肺被牵拉而扩张的条件 2)Facilitate the venous and lymphatic return 促进静脉血液和淋巴的回流 Chest tube 探 气胸？ Pneumothorax Re-expanded lung
1）Allow expansion of the lungs 肺被牵拉而扩张的条件 2）Facilitate the venous and lymphatic return 促进静脉血液和淋巴的回流 临 床 气胸? 胸内负压的生理意义