ALIMENTARY CANAL AND ITS APPENDAGES 



415 



the intralobular veins. The blood is finally carried, as already 

 pointed out, by the hepatic veins into the inferior vena cava. The 

 hepatic artery, a direct offshoot of the celiac axis (p. 416) supplies 

 some blood to the lobular plexuses, but by no means so much as 

 the portal vein; it all finally leaves the liver by the hepatic veins. 



The bile-ducts can be readily traced to the periphery of the 

 lobules, and there communicate with a network of extremely 

 minute commencing bile-capillaries, ramifying in the lobule between 

 the hepatic cells composing 

 it. The relation of the 

 bile-capillaries to the blood 

 capillaries within the lobule 

 is such that there is always 

 a liver-cell interposed be- 

 tween them. 



From the arrangement of 

 blood-capillaries and bile- 

 capillaries with their con- 

 nections we can picture the 

 movement of blood and bile 

 through the lobules; the 

 blood, both from the portal 

 vein and the hepatic artery, 

 is delivered to the lobule at 

 its periphery and flows 

 thence from all sides to- 

 ward the center, where it 

 enters the interlobular vein 

 and is conveyed away. The 

 bile, on the other hand, is 



Secreted by the liver-cells FIO. 136. Diagram of abdominal part of al- 

 1 f n )!,,.,, nac irl intn imentiiry canal. C, the cardiac, and P, the 



and from them passed into pylori( . ;>lul of t|ic ?t ^ marh . Dt tho duodenum; 



the bile-capillaries; it flows -A I, the convolutions of the small int.-Mm, ; 



CC, the cax-urn with the vermiform apiM-n.liv; 



along these toward thc pe- AC, uMvnding. TC, transverse, and DC, de- 

 . , , sccnding colon; K, thc rectum. 



nphcry where it enters 



small bile-ducts, and so is carried toward thc great outlet of the 



gland, thc hepatic duct. 



The Pancreas or Sweetbread. This is an elongated soft organ of 

 a pinkish-yellow color, lying along thc great curvature of the 



sr 



