352 



DISSECTION OF THE ABDOMEN. 



projec 

 of the 



appearance to the surface. This condition will be seen, with the 

 aid of a lens, to be most developed about the centre of the sac, and to 

 diminish towards each extremity. In the bottom of the larger pits 

 are depressions leading to recesses. 



tions Where the gall-bladder ends in the cystic duct (fig. 133) its coats 

 e wall. p ro j ec t i n to the interior, and give rise to ridges resembling those in 

 the sacculated large intestine. 



Duct of gall- 

 bladder ; 



The cystic duct (6) joins the hepatic duct at an acute angle, to 

 form the common bile-duct. It is about an inch and a half long, 

 and is distended and somewhat sacculated near the gall-bladder. 



Anterior border of pancreas. 

 Spleen. 



Ascending colon. Superior mesenteric vessels. 



Lower part of the splenic 

 flexure of the colon. 



FIG. 134. DEEP VISCERA OP THE ABDOMEN OP A CHILD. 

 (From a specimen in the Charing Cross Hospital Museum.) 



structure. 



Structure. The coats of the duct are formed like those of the sac 

 from which it leads, but the muscular fibres are very few. The 

 mucous lining is provided with glands, as in the hepatic and common 

 bile-ducts. 



On opening the duct the mucous membrane may be observed to 

 form about twelve semi-lunar projections (6g. 133, c), which are 

 arranged obliquely around the tube, and increase in size towards 

 the gall-bladder. This structure is best seen on a gall-bladder 

 which has been inflated and dried, as in this state the parts of the 

 duct between the ridges are most stretched. 



Blood-vessels and nerves. The vessels of the gall-bladder are named 

 cystic. The artery is a branch of the hepatic ; and the cystic vein 

 nerves and opens into the right branch of the vena portse. The nerves are 



Mucous coat 

 like a screw. 



Artery and 

 vein : 



