ORGANS OF DIGESTION. 



225 



these supplementary glands are the salivary glands, the pan- 

 creas, and the liver. 



The length of the small intestine is about twenty-five feet, 



Parotid Sali- 

 vary Gland 



Gullet 



Precaval Vein 

 Postcaval Vein 



Sublingual 

 Salivary Gland 



Submaxillary 

 Salivary Gland 



Hepatic Vein 



Mesenteric 

 Vein 



-- Receptacle of 



Chyle 

 "" Lacteals 



Mesentery 



Intestine 

 Fig. 69. Diagram of the Organs Concerned in the Conversion of Food into Blood. 



and of the large intestine five or six feet. As in the lower 

 mammals, the large intestine is not a direct continuation of 

 the small; that is, the small intestine opens into the large 

 near the beginning of the latter, so that there is a short blind 



