[绿色心形R]继续学习呼吸系统连接词的学习~[绿色心形R]气胸:Pneumothorax.Airgathersinthepleuralcavity,causingthelungtocollapse.Whenthishappens,thelungcannotfillupwithair,breathingbecomesmoredifficult,andthebodygetslessoxygen.Onsetofpneumothoraxismarkedbysudden,sharpchestpainwithdifficultybreathing.[绿色心形R]肺不张:Twoformsofatelectasis.A,Bronchialobstructionpreventsairfromreachingdistalairways,andalveolicollapse.Themostfrequentcauseisblockageofabronchusbya