150 ELEMENTARY rJOLOGV. [CIIAT. 



difTused throughout a connective-tissue mesh- 

 "work {stroma). 



p. The /u/iic ; a dense connective-tissue investment 

 for the wliole, continuous with the stroma. Look 

 for the cut ends of blood-vessels (cf. perimysium, 

 perineurium, periosteum). 



A l-^xamine under a high power. 



c. The acini ; eacli composed of a single layer of 

 large epithelial cells, set around a small ir- 

 regular central cavity. 



p. The ducts ; packed among a, cliaracterized by 

 the large size and regularity of their central 

 cavities; in section rounded or oval, cacli lined 

 by an epithelium of squarish cells. 



Look for portions showing the transition of 

 gland into duct. 



1 8. The liver. 



Preserve some small pieces of fresh liver in alcohol, 

 and prepare sections as directed for the pancreas. 



a. Examine under a low power. 



The gland cells will be found to be arranged in 

 groups, around a ramifying system of clear spaces 

 with granular-looking contents [blood-vessels). 



b. Examine under a high power. 



c. The gland cells ; for the most part squarish or 

 hexagonal, each lodging a large round nucleus 

 with one larger and several smaller nucleoli. 



p. Look for sections of longitudinal series cells ; 

 note their arrangement in parallel rows. 



y. Blood capillaries ; cf supra. The granular ap- 

 pearance seen under the low power will be found 



