VASCULAR SYSTEM 



803 



sv 



su.v 



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 connected 

 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 duo- 

 denum. 



The mesentery, which supports 

 the alimentary canal, is a double 

 layer of peritoneum reflected from 

 the dorsal abdominal wall. 



The dark red spleen lies behind 

 the stomach. In the mesentery, 

 not far from the top of the right 

 kidnev, he a pair of coeliac ganglia, 



B 



su.v 



Fig. 483. — Blood corpuscles. 



si 



A, Typical mammalian red blood 

 corpuscles. In all Mammals 

 they are non-nucleated and 

 slightly biconcave. They are 

 circular in outline in all Mam- 

 mals except Camelidae, in which 

 they are elliptical. S.V., Seen 

 end on ; SU.V., surface view. 



B, Typical form in other Verte- 

 brates — elliptical and biconvex. 



which receive nerves from the 

 thoracic sympathetic system, 

 and give off branches to the 

 gut. 



Vascular system. — The 

 blood of Mammals contains, as 

 in other Vertebrates, red blood 

 corpuscles (erythrocytes) and 

 white blood corpuscles (leuco- 

 cytes), but the former are non- 

 — From Krause, in part after nucleated except in their young 

 Claude Bernard. Stages. It is probable that the 



p., Pyloric end of stomach ; g.6., gall- nuclcar material bccomcs dif- 



bladder with bile duct and hepatic r 1 .r „U t-U^ .^11 T'U^^r 



ducts; />.^., pancreatic duct. fuscd through the Cell, i hcy 



Fig. 484. — Duodenum of rabbit. 



