THE DIGESTIVE TRACT 



57 



The Digestive Tract. Teeth. Sheep grow two sets of teeth ; 

 the first or temporary teeth number 20, and the second or perma- 

 nent teeth number 32 ; of the permanent teeth, 8 are incisors, 12 



Posterior 

 vent rat 

 blind Sac 



Fio. 28. Abdominal visc 



era of sheep; superficial ventral view. 

 Animals," Sisson, W. B. Saundera Co.) 



Lnatomy of Domestic 



premolars and 12 molars. There are no teeth in the front part of the 

 upper jaw in either lambs or sheep, but instead a cartilaginous pad, 

 on which the incisor teeth of the lower jaw impinge. As a rule, the 



