12 



ELEMENTS OF MAMMALIAN ANATOMY 



and injected caudad into the external jugular in the same man- 

 ner as described for the arteries. 



By making a slit about three inches long in the abdominal 

 wall, a fold of the intestine may be pulled 

 out so that its lumen can be filled with 

 about 200 c.c. of 15% formalin. The 

 same amount should be injected into 

 the lungs by inserting the cannula 

 caudad into the ventral wall of the 

 trachea. If the cat is not to be used at 

 once, it may be preserved indefinitely in 

 a jar of five per cent, formalin. 



The portal system is not injected 

 through the jugular vein. The portal 

 trunk just caudad of where it enters the 

 Fig. 4.— Method of liver may be found by cutting a piece from 



Inserting the Can- ., 1 1 • i n -i • i . .1 



NULA into a Vessel, the abdommal wall on the right ventral 



aspect just caudad of the last rib. After 

 two loose knots are tied around this trunk as directed for the 

 jugular, the cut is made and the cannula inserted into the 

 portal system of a large specimen. This 

 should not be injected until the other sys- 

 tems have been filled. 



The lymphatic system must likewise be 

 injected for demonstration. While the cat 

 is being anesthetized, dilute India ink, or 5 

 gm. of soluble Berlin blue are dissolved in 

 100 gm. of water, and the solution warmed 

 to about the temperature of the body. As aspect of Cat's Paw 

 soon as the cat is unconscious the syringe ^^'"" Cannula In- 



•^ " SERTED. 



should be warmed by filling it with hot 

 water, and the point of the cannula pushed obliquely 

 proximad under the thick skin on the palm (Fig. 5) of 

 the paw. The syringe after being half filled with India ink or 

 Berlin blue solution is attached to the cannula and the plunger 



Fig. 



-Palmar 



