VIII 



LIVER 



133 



The Liver. Sections of the liver show it to be made up of 

 innumerable large, polyhedral cells (Fig. 41, hp, c\ arranged 

 in columns, and bounding extremely fine channels or bile- 

 passages (c.b) b.p]. These are found to open into one 



bp 

 \-nif 



FIG 41. A, portion of a section of the frog's liver ; B, small portion of the same, 



showing the origin of a bile-duct. 



bl, blood-capillaries ; b.p., c.b, c.b', c.b", bile-passages; c.b"', the same in^ trans- 

 verse section ; c, hp, liver cells ; d, smallest bile-duct ; nc, nu. nuclei. (A, 

 after Howes ; B, after Hoffmann.) 



another, and finally to discharge into definite tubes (B, d\ 

 lined with epithelium. These, in their turn, unite into larger 

 and larger tubes, which form the hepatic ducts and ultimately 

 open into the common bile-duct (p. 68). 



