334 DISSECTION OF THE RABBIT. 



to fit the right kidney : its inner and anterior 

 border is connected by a bridge of liver-tissue 

 with the Spigelian lobe. 



b. The gall-bladder is an elongated thin-walled sac, 



rather, less than an inch in length, of a dark 

 green or brown colour, and lying in the groove 

 in the posterior surface of the right central lobe 

 of the liver. 



c. The bile-duct is a narrow tube, about two inches 



long, running backwards from the smaller and 

 dorsal end of the gall-bladder to open into the 

 dorsal surface of the duodenum, about a third of 

 an inch beyond the pylorus. It receives ducts 

 from the several lobes of the liver, and lies in the 

 mesentery immediately to the right of the large 

 portal vein. 



0]}en the duodenum opposite the openiTtg of the bile-duct ; 

 wash out its contents, and find the aperture of the duct on a 

 small papilla. The hile-dv^t is most easily traced from the 

 duodenum fonoards, and may with ad/vantage be first injected 

 from a point about half an inch from the duodenum. 



Unravel the coils of the intestine, freeing them from one 

 another by cutting through the mesentery along its line of 

 attachment to the intestine. Leave the duodenal loop and 

 the rectum, with their mesenteries, untouched. Carefully avoid 

 injuring or removing the cmliac and mesenteric ganglia and 

 the associated nerves {see p. 372). 



Layout theintestineonthedissecting-board,so as to show the 

 relations andproportions of its severalparts. Avoid all utmeces- 

 sary injury to the blood-vessels, and ligature any that bleed. 



5. The small intestine, which is directly continuous with 

 the duodenum, is about seven or eight feet in length, 

 and of uniform diameter throughout. 



a. Peyer's patches are slightly thickened oval spots, 

 granular in appearance, and about a third of an 



