BILE DUCTS. GLYCOGEN. 79 



Liver. Man, stained Golgi for bile ducts, (p. 11, s. 27, c. G., 

 m. B., uncovered, or see 11.) (H) Find the black, close, and 

 angular meshed system of bile channels amongst the cells. 

 They open into the ducts in the capsular connective tissue. 



Liver. Kitten, for larger ducts and gall bladder, (p. 3, inj., 

 s. 22 & 24, c. P., m. B.) (L) Find a large duct in a portal 

 tract. The lining epithelium is cubical and thrown into folds. 

 Externally to this observe the small sacculations lined with 

 the same kind of epithelium, so-called mucous glands, the 

 epithelium of which, however, does not resemble that of 

 mucous glands elsewhere. Examine the wall of a portal vein 

 and note that there is hardly any muscular tissue in it. The 

 gall bladder is lined by cylindrical cells. Note the glandular 

 sacculations. Outside this find the pronounced muscular coat 

 containing ganglionated nerves. 



Liver. Rabbit, for glycogen. (p. Absolute alcohol injected, 

 c. P.) After the removal of the paraffin on the slide, stain with 

 a strong alcoholic solution of iodine in iodide of potassium, m. B. 

 The brown-red stain brings into view the nodular masses of 

 the glycogen in the cytoplasm. 



