hydropneumothorax medical poster

hydropneumothorax air fluid pleural space chest hemithorax hydropneumothoraces pneumohydrothorax pneumohydrothoraces respiratory system trachea pleura breath lung anatomy inspiration function human exhale inhale diagram thoracic vector expiration respiration cavity pressure illustration section science movement organ membrane visceral parietal disease pleurisy pulmonary pleuritis influenza lining medical bronchi health diagnosis biology oxygen