FfSH 



PLEURAL CAVITIES 



PLEURO-PERITONEAL CAVITY 



StEDIASTlNUM 



lAPHRAOM 



AMPHIBIAN 



PERITONEAL \ / 

 CAVITY r 



PLEURO-PERITONEAL CAVITV 



REPTILE 



MAN 



Fig. 82. — Diagrams showing the coelom and its divisions in various vertebrates. 



For the arrangement in birds, see Fig. 212. 



