THE ABDOMEN AND PELVIS 



475 



pancreas; but the others glide upon each other as they are alternately 

 empty or full : and to facilitate this motion they are (like the lungs) 



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invested with a serous coat, the peritoneum. They may be divided into 

 the hollow organs, which form one continuous tube (the alimentary), and 

 the solid viscera, which, with the exception of the spleen, are all of a 



