686 



MAMMALIA. 



tinuous with the colon or first part of the large intestine, the 

 beginning of which is much sacculated. The large intestine 

 narrows into the long rectum, in which lie little faecal pellets. 

 On the last two inches of the rectum there are paired 

 yellowish glands. Beside the anus are two bare patches of 

 skin, with the openings of the ducts of the perineal glands, 

 whose secretion has a characteristic and strong odour. 

 The liver is attached to the diaphragm by a fold of peri- 

 toneum the glistening mem- 

 brane which lines the abdomi- 

 nal cavity. In the liver there 

 are five lobes. From these 

 lobes the bile is collected by 

 hepatic ducts into a common 

 bile duct, which is also con- 

 nected to the gall-bladder by 

 the cystic duct. 



The very diffuse pancreas 

 lies in the mesentery of the 

 duodenal loop. Its secretion 

 is gathered by several tubes 

 into the pancreatic duct which 

 opens into the duodenum. 



The mesentery, which sup- 

 ports the alimentary canal, is a 

 double layer of peritoneum re- 



339. Duodenum of rabbit. flppj . pr | r ^ Hnrsnl nhrln 



"SCtCd irom the dorsal abClO- 



minal wall. 



The dark red spleen (of im- 

 portance in connection with 

 the blood) lies behind the 

 stomach. In the mesentery, not far from the top of the right 

 kidney, lie a pair of crjeliac ganglia, which receive nerves from 

 the thoracic sympathetic system, and give off branches to 

 the gut. 



Vascular system.- -The four-chambered heart lies in the 

 thoracic cavity between the lungs. It is surrounded by a thin 

 pericardium, and immediately in front of it there lies the soft 

 thymus, which is larger in the young than in the adult animal. 

 By two superior venae cavae, and by the inferior vena 

 cava, the venous blood collected from the body enters the 



From Krause, in part after 

 Claude Bernard. 



/'., Pyloric end of stomach ; .?.?>., gall- 

 bladder with bile duct and hepatic 

 ducts ;/.(/., pancreatic duct. 



