RABBIT. 129 



Each divided into three chief regions. 

 Count the number of digits. 

 II. Abdominal Yiscera. 



Spread the animal out dorsal side dotvn with its 

 head hanging over the edge of the pan, and 

 fasten it down by the legs. 



Make a shallow cut along the median ventral line 

 and skin the ventral and lateral regions of the 

 abdomen and thorax. (The skinning to be com- 

 pleted later.) Open the abdominal cavity by a cut 

 in the median ventral line. 



1. What forms the anterior wall of the abdomi- 



nal cavity ? 



2. Identify the organs exposed to view ; e.g., 



the stomach, the liver, the intestine, etc. 

 Pass a single ligature around the oesophagus 

 near the cardiac end of the stomach^ and double 

 ligatures around the rectum about two inches 

 from the anus. Find the portal vein t and double- 

 ligature it at a little distance from the liver. (So 

 that later the intestine may be taken out.) 



3. Examine the intestine. 

 (a) In place, finding : 



(aa) The pancreas and duct. 



The pancreas consists of a number 



of scattered masses lying in the 



mesentery of the duodenum. Its 



duct opens into the ascending loop 



of the duodenum, and is formed 



