The liver is a single dorsoventrally flattened mass extend- 

 ing back, further on the right side, for more than half the 

 length of the body cavity. Anteriorly it tapers to the hepatic 

 vein. Its right and posterior margins are lobate. The gall 

 bladder shows on the right side near the point of entrance 



of the bile duct into the duodenum. The pancreas is well 

 developed, lying in the dorsal mesentery along the anterior 

 margin of the gut between the pyloris and bile duct. At 

 the bile duct, finger-like extensions follow the converging 

 veins of the portal system. A small separate section ex- 



falciform ligament 

 (mesentery) 



gall bladder. 



pocket 

 .pharyngeal slits 



small intestine 



dorsal mesentery pulled over from midline 



gastrohepotic ligament (mesentery) 

 spleen 



falciform ligomenty 

 (mesentery) 



oviduct 



mesentery of lung_ 



free margin of dorsal mesentery^ 

 stomacfi 



gall bladder- 

 (dashed line) 



pancreas. 



small intestine 



oviduct (supported by 

 dorsal mesentery) 



large intestine 



B 



Mullerian duct 



cloaca opened 



Figure 9-1 1 . Ventrolateral views of the viscera of Crypfobronchus, A, and Necfurus, B. 



THE DIGESTIVE TRACT AND ASSOCIATED STRUCTURES • 263 



