病因与机制(causes and pathogenesis) ☆呼吸系统(respiratory system: 1.支气管疾病(bronchus disease) 2.肺部疾病ung disease) ☆循环系统(circulatory system:病因与机制(causes and pathogenesis) 呼吸系统(respiratory system)； 1.支气管疾病(bronchus disease) 2.肺部疾病(lung disease) 循环系统(circulatory system)；