34 



Gall Bladder. 



363. Gall-Bladder and 364. Gall-Bladder and 



Biliary Dlicts. From an infla- Biliary DuctS. The anterior 



ted and dried specimen. Natural wall of the dried specimen removed, 

 size. Natural size. 



The gall-bladder, Cystis fellca s. Cholccystis, is lodged in a 

 fossa on the under surface of the right lobe of the liver ; it is pear- 

 shaped- its fun tins projects from the anterior border of the liver, its 

 curved and constricted neck terminates in the cystic duct, Ductus cysticus, 

 The mucous membrane is elevated into numerous small ridges ; in the 

 neck of the bladder and the cystic duct the mucous membrane is elevated 

 into a series of folds, so as to present very much the appearance of a 

 spiral valve, the Valvula Hcisteri. 



The cystic duct unites with the hepatic duct which issues from 

 the transverse fissure of the liver to form the c o m m on bile due t, Ductus 

 communis cholcdocJtus ; this is about the diameter of a goose-quill. The Ductus 

 cholcdochus unites with the Ductus pancreaticm and runs along the posterior 

 wall of the descending portion of the duodenum ; it forms an elevation 

 beneath the mucous membrane and opens on the inner surface of the 

 intestine. 



The gall-bladder has an external fibrous coat, a middle muscular 

 coat (longitudinal and transverse fibres) and the internal mucous 

 membrane; it is lined by peritoneum only on its under surface and its 

 fund us. 



