196 ABDOMINAL OliGANS. 



the gullet, or Esophagus. At the larger end (to the left) of 

 the stomach is a deep red body, the Spleen. 



6. Find now the connection between the stomach and the 

 intestine. Make a drawing of the stomach, showing its shape 

 and the connection with the gullet and the intestine. 



7. Trace the intestine ; that part which forms a long loop 

 near the stomach is the Duodenum. Within this loop is an 

 irregular, pinkish, or fatty-looking mass, the Pancreas. Find 

 the Pancreatic Duct entering the intestine. This is more 

 easily found in the dog. 



8. Observe that the intestine is held by a thin membrane, 

 in which are branching blood tubes ; this is the Mesentery ; 

 find its supporting attachment. In tracing its course, drag 

 the intestine out of the abdominal cavity, but do not tear the 

 mesentery. 



9. Observe that the Small Intestine runs into the Large 

 Intestine at a right angle near the beginning of the large intes- 

 tine. The blind end of the large intestine, back of the 

 entrance of the small intestine, is the Cecum. In the rabbit 

 it is long, in the cat short. 



10. Turn the liver forward, and find, on its posterior sur- 

 face, the dark Bile-sac. The Bile-duct, by which the bile is 

 conveyed into the intestine, may be traced by cutting into the 

 bile-sac, and probing with a bristle tipped with sealing-wax. 



11. Pull the liver back, and examine the thin muscular 

 partition, the Diaphragm, which extends across the body, sep- 

 arating the chest cavity, or thoracic cavity, from the abdom- 

 inal cavity. 



12. Note the passage of the gullet, aorta, and postcaval 

 vein through the diaphragm. 



13. Attached to the dorsal walls of the abdomen are the 

 dark-colored, bean-shaped Kidneys. 



Tie the gullet in two places half an inch apart, and cut 



