VISCERA 



These directions are given as though no other work had 

 been done on the animal because of the fact that it may 

 be desirable to start with the digestive organs if the circu- 

 latory system is not included in the dissection. 



Make a median cut along the linea alba, taking care not 

 to cut the organs beneath the body wall. This cavity 

 exposes the pleuro-peritoneal cavity which contains the 

 lungs, digestive organs, urogenital organs, and other struc- 

 tures. It is lined with peritoneum. Measure the length 

 of the cavity and get the position of the organs in this 

 length. Spleen 22-70. would indicate that the anterior of 

 the spleen was 22 mm. from the anterior end of the cavity, 

 and the posterior end 70 mm. from, the anterior end. 



Liver 



The large liver is on the ventral side of the body and 

 usually forces itself out, when the body wall is cut through. 

 It is fastened to the body wall by the mesohepar, one of 

 the mesenteries. Find the relative length of the liver in 

 the cavity. Look between the lower and median lobes for 

 the gall bladder. It is large and easily seen. Follow the 

 gall bladder and its duct to the liver and to the end of the 

 duodenum. Note the lobes of the liver. Push the liver to 

 one side and note the parts of the digestive tube. 



Pancreas 



The lobate, whitish, pancreas is applied to the duode- 

 num. It sends an arm forward and one along the intestine. 



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