460 APPENDIX. 



13. Trace the pulmonary veins (p. 315) (filled with red injection) 

 and the pulmonary artery (p. 280). 



IV. Vessels in the abdominal cavity. 



1. Open the abdominal cavity; find the superior mesenteric vein 

 (p. 326, and Fig. 132) in the duodenal mesentery near the border of 

 the pancreas. Inject this in both directions with white starch and 

 then dissect the portal vein and its tributaries without injuring any 

 of the structures in the abdomen (p. 326, and Fig. 132). 



2. Follow the inferior vena cava (p. 325) from the heart to the 

 diaphragm and then follow it to its tributaries in the abdominal 

 cavity. 



3. Dissect the branches of the abdominal aorta (p. 301) and of 

 the inferior vena cava (Fig. 126). Make diagrams of the vessels dis- 

 sected and review as far as necessary the viscera concerned. 



V. The external iliac and its branches (vessels of the hind limbs) 

 (pp. 309 and 329, and Figs. 127, 128, and 163). 



Follow the branches of the external iliac arteries and the corre- 

 sponding veins in the same manner as the vessels of the arm were 

 traced, cutting the muscles only so far as absolutely necessary. 

 Make diagrams of the vessels dissected. 



Make a diagram (a) of the arterial system as a whole; () of the 

 venous system as a whole. 



THE LYMPHATIC SYSTEM (p. 330). 



It will hardly be found practicable to have each student make a 

 dissection of the lymphatic system, and such parts of it as are to be 

 studied may best be shown on a specimen prepared for demonstration 

 purposes. 



The thoracic duct and the receptaculum chyli may be demon-, 

 strated by the following well-known method : A lean cat is fed with 

 milk about two hours before killing it. An egg may be beaten up 

 with the milk to advantage. Kill the cat with chloroform, and inject 

 the arteries with colored starch through the femoral, in the usual 

 way. The thoracic duct, the receptaculum chyli, and the lymphatics 

 leading to the receptaculum chyli will be colored white by the milk, 

 and can therefore be easily followed. For this purpose the abdomen 

 should be opened, and the left side of the thorax removed, as in the 

 dissectjon of the blood-vessels. The thoracic duct will be found at 

 the left side of the aorta and may then be traced in both directions. 



For a more complete study of the lymphatics they should be 

 injected. This is done as follows: Make a glass canula with a small 

 point, and leave the point sharp. Connect this to the syringe by 

 means of a rubber tube. Use a saturated solution of soluble Prussian 

 blue as injecting fluid. Employ a freshly killed animal. 



For injecting the lymphatics of the limbs, make with some pointed 

 instrument, as the tracer, a small hole in one of the pads on the sole 

 of the foot. Introduce the point of the canula into this opening and 



