part of part of in lateral side of located in located in in taxon develops from develops from Chordata embryo embryonic structure coelemic cavity lumen body-wall mesenchyme pleuropericardial folds pleuropericardial membrane EHDAA:4126 EHDAA2:0001480 pleuropericardial membranes VHOG:0001499 pleuro-pericardial folds EMAPA:17706 NCIT:C34255 Each of the folds that grow out from the lateral part of the body wall. They fuse and meet with the dorsal and ventral mesentery of the foregut, separating the pleural cavities from the pericardial cavity. UBERON:0006278