36 



ANIMAL MANAGEMENT. 



The parts 

 of the 

 teeth. 



The parts of the teeth. — The surface which bites on the food or its 

 fellow in the opposite jaw is the tabic, or wearing surface. The mark is 

 the blackened depression which is seen on the table. It is lined by a 

 distinct, narrow, pearly-white ring of enamel. This latter is easily seen 

 and felt, as it stands up a little above the level of the rest of the surface. 

 In the new tooth the mark is very broad and deep, but with age and 

 wear it becomes shallower and smaller, till finally it disappears altogether. 



Fig. 5. 

 Diagram to show the diflerent parts of a tooth and their relative positions. 



1. Enamel. 3. Fang-hole. 



2. Ivory (tooth substance). 4. The mark. 



The 

 crown. 



The fang. 



The blackening of the mark is due to discolouration from the food during 

 mastication, and is not present in the new tooth. 



The crown of the tooth is that part which is above the gum, and the 

 point where the gum and tooth meet is the 7ieck. 



The fa?tg is the part within the jaw. It is hollow and its cavity 

 (fang-hole) contains the blood-vessels and nerves which nourish and 

 sensitise the tooth. As the tooth grows up, the fang-hole becomes filled 



