122 PRACTICAL ZOOLOGY. 



size, shape, or markings, but do not now move any 

 part from its natural position. 



4. In the front part of the abdomen the dark-colored 

 liver may be seen, overlapping the stomach, and in 

 the hinder part of the abdomen there may be seen the 

 bladder, varying greatly in size and appearance ac- 

 cording to its state of distension. 



5. Pull the intestine backward, and make out the shape, 

 size, position, and color of the stomach. Observe how 

 the liver and stomach fit together; push the liver 

 forward, and turn the stomach back to find a white 

 tube entering its anterior surface ; this is the gullet, or 

 esophagus. Just back of the stomach is a small red 

 body, the spleen. 



6. Fftid now the connection between the stomach and 

 intestine. Make a drawing of the stomach showing its 

 shape and the connections with the gullet and intestine. 



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

 loop near the stomach is the duodenum. Within 

 this loop is an irregular, 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-vessels; this is the 

 mesentery ; find its supporting attachment. In trac- 

 ing its course drag the intestine out of the abdominal 

 cavity, but do not tear the mesentery. 



9. The large greenish side-branch of the intestine is the 

 caecum. All the intestine from the stomach to the 

 entrance of the caecum is the small intestine ; that 

 part of the intestine posterior to the entrance of the 

 caecum is the large intestine. 



