ORGANS OF NUTRITION IN THE OX. 



83 



expressed in the very same terms there is proto-plasma and 

 a cell. The cell grows by the absorption and elaboration of 

 the proto-plasma. The proto-plasma (called also cytoblastema) 

 corresponds to the blood-plasma (p. 11). 



And the same rule applies to sanguification, if the blood- 

 corpuscles are originally vesicular germs secreted by the blood- 

 glands and nourished into maturity by contact with organic 

 proximate principles in the lacteal and lymphatic vessels 

 subsequently in the blood itself. 



ORGANS OF NUTRITION IN THE OX. 



The mouth in the ox has the same general character as the 

 mouth in the horse, and includes corresponding parts, as seen 

 in fig. 7. 



VERTICAL SECTION OF THE HEAD OF AN ADULT Ox. 



a, Incisor teeth ; b, molar teeth. The course of the nerves connected with the teeth 

 is also shown in this figure. 



Mouth, Teeth. Like the horse, the ox has a set of decid- 



