動物生理學5呼吸系統(tǒng)生理上-在線瀏覽
2025-07-16 17:17本頁面
【正文】 ith the movement of structures in thoracic cavity wall and of the diaphragm. Pleura ： surrounding each lung is a serous (含漿液的）membrane, the pleura. The out layer adheres to the inner thoracic wall and the diaphragm. The inner layer covers the lung the potential space between the two layers is called the pleural cavity, the layers normally move easily over each other with movement of the thorax. Pressure in the interpleural space is always negative.（平靜呼吸時） 氣胸（ Pneumothorax) 胸膜腔內壓＝肺內壓－肺回縮壓 當呼吸暫停時 胸膜腔內壓＝大氣壓－肺回縮壓 若以大氣壓為“ 0” 胸膜腔內壓＝－肺回縮壓 胸腔負壓也可作用于腔靜脈和胸導管，影響靜脈血和淋巴的回流。作用是降低肺泡液－氣界面的表面張力，而肺的回縮力減小。 早產嬰兒 Inspira tor y Reser ve V olume 補吸氣量 1. 5 2. 0 L T idal V olume 潮氣量 M, F 0. 5 L Inspira tor y Capa cit y 深吸氣量 V it al Capa cit y M 3. 5 L F 2. 5 L Expi ra tor y Reser ve V olume 補呼氣量 0. 9 1. 2 L T ot al Lung Capa cit y 肺總容量 M 5 L F 3 . 5 L Resi dual V olume 殘氣量 1 1. 5 L Functi onal Residua l Capa cit y 功能殘氣量 肺通氣功能的評價 Pulmonary volume and Pulmonary Capacity Timed vital capacity 四種基本肺容積：潮氣量、補吸氣量、補呼氣量、殘氣量。 T S D∝ d Transport of respiratory gases The forms of O2 and CO2 carried in blood Oxygen is carried in the blood in two forms: in physical solution and in bination with hemoglobin. Approximately % of the O2 carried in the systematic arterial blood at normal PO2 is disso
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