THE BODY CAVITIES, DIAPHRAGM AND MESENTERIES 



l8 7 



Esophagus 



Mesoderm of left lung bud, 

 Pericardial cavity 



Pleura-peritoneal 



membrane 

 Phrenic nerve 



Septum transversum 



Pkural cavity 



Right lung bud 



Pleuro-pericardial 

 membrane 



Wall of heart 



Liver- 



Falcifoam ligament 



FIG. 195. Transverse section through a 10 mm. human embryo, showing the pleuro-pericardi al 

 membranes separating the pericardium from the pleural cavities. X 33. 



Esophagus 

 Right lung. 



Coronary appendage of- 

 liver 



Vena cata inferior 



Pleural cavity 



Pleuro-peritoneai 

 membrane 



Phrenic nerve in septum 

 transversum 



FIG. 196. Transverse section through a 10 mm. human embryo, showing the' pleuro-peritoneal 



membranes. X 16. 



