SYSTEMATIC ANALYSIS OF APPARATUS. 



123 



duction of heat, and of course not to the Lungs nor to 

 the Digestory Organs as Eliminatory Organs. 



462. THE- BRAINS WILL REQUIRE especial Elimina- 

 tory Organs independent of other activities, and devoted 

 to its one purpose, the activities of which can be con- 

 trolled solely with reference to Elimination. 



463. THE KIDNEYS ARE FURNISHED for the purpose 

 of removing from the Blood a part of the substances 

 thrown into it by the Brain and Nerves, and, as Elimi- 

 nating Organs, correspond to the Nervous system. 



FIG. 107. FIG. 108. 



Fig. 107, front view of left Kidney: 8, 9, arteries; 10, 11, 12, veins; 7, 

 ureter ; 13, suprarenal gland. 



Fig. 108, section of left Kidney : 1, suprarenal capsule or gland ; 2, out- 

 er skin ; 3, part which eliminates ; 4, tubes ; 7, 8, basin ; 9, ureter. 



464. THE LARGE BRANCHES OF THE ARTERIES LEAD- 

 ING TO THE KIDNEYS indicate the importance of their 

 office, more Blood being supplied to them, in proportion 

 to their size, than to any other parts except the Brains 

 and Lungs, the latter receiving all of it, as stated. 



465. THE KIDNEYS MAY HAVE AN ADDITIONAL OF- 

 FICE of Eliminating a part of the material thrown into 

 the Blood by the Bones. 



462. What ? 468. For what ? Describe Fig. 107. Fig. 109. 464. What do 

 ? 465. What ? 



