58 SHEEP DISEASES. 



The salivary glands are well formed and the 

 parotid ducts open opposite the third molar. 



The tonsil is bean- shaped and about one-half 

 inch long. 



The pharynx has a median fold which is a con- 

 tinuation of the nasal septum. 



The esophagus has a lumen of about one inch 

 when moderately distended. 



The four compartments of the stomach the 

 rumen, reticulum, omasum and abomasum have 

 a total capacity of about four gallons. The 

 omasum is very small, having a capacity of only 

 a pint. The abomasum is larger, holding nearly 

 two quarts. 



The small intestines are about eighty feet long, 

 and the lumen is about one inch in diameter. 



The cecum is about a foot long, and of a capac- 

 ity of nearly a quart. 



The colon is about fifteen feet long, its lumen 

 ranging from one inch to two inches. 



The liver weighs about one and one-half pounds, 

 and lies mainly on the right of the median line. 



The bile duct joins the pancreatic duct and 

 opens into the duodenum about a foot posterior to 

 the stomach. 



The spleen is triangular in shape, weighing 

 about three ounces. 



THE RESPIRATORY SYSTEM. 



The nostrils are small and not very dilatable. 

 The nasal cavity is very short and narrow be- 

 hind. 



The larynx is small and compact. 



