Chapter 5 RESPIRATION Introduction Containing:inspiration expiration ●Functions: Obtain O,from external environment Remove CO2 form the body Respiratory processes: Pulmonary ventilation Gas exchange in the lung Gas transport in the blood Gas exchange in the tissue
Chapter 5 RESPIRATION Introduction • Containing: inspiration & expiration • Functions: Obtain O2 from external environment Remove CO2 form the body • Respiratory processes: Pulmonary ventilation Gas exchange in the lung Gas transport in the blood Gas exchange in the tissue
血液循环 组织、 细胞 00 肺通气 肺换气 气体在血液 组织细胞内氧 中的运输 换气 化代谢 Respiratory 外呼吸 内呼吸 processes
Respiratory processes
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
平静吸气时 深吸气时 Respiratory movement
Respiratory movement
Types of respiration >Eupnea Forced breathing (Deep breathing) >Abdominal Thoracic breathing Principles of pulmonary ventilation >Contraction (Relaxation)of inspiratory muscles->Expansion (Reduction)of thoracic cavity--→(？)Distension(Recoil）训of alveoli--→ Intrapulmonary pressure(T)<(>)atmo- spheric pressure->Air flows into (out of)the alveoli
Types of respiration ➢Eupnea & Forced breathing (Deep breathing) ➢Abdominal & Thoracic breathing Principles of pulmonary ventilation ➢Contraction (Relaxation) of inspiratory muscles→Expansion (Reduction) of thoracic cavity→(?)Distension (Recoil) of alveoli→ Intrapulmonary pressure()<(>) atmospheric pressure→Air flows into (out of) the alveoli