680 



THE EYE 



what according to its state of activity. After a period of rest, and 

 in the ordinary condition of relative inactivity, the epithelium becomes 

 distended with secretion and is either clear in appearance or at most 

 is only very finely granular, the nuclei are crowded to the base of the 

 swollen cells, and the lumen of the acinus is very small. After a period 

 of excessive activity the secreting cells become shrunken and more dis- 



FIG. 569. SECTION THROUGH A LOBULE OF THE LACRIMAL GLAND OF MAN. 



a, small duct branching within the lobule; b, intercalary ducts; c, connective 

 tissue;/, fat cells. A, transection of an interlobular duct. Hematoxylin and eosin. 

 X 112. (After Kolliker.) 



tinctly granular, and the lumen of the acinus appears much dilated. 



The secreting acini empty into narrow intercalated ducts which lie 

 within the lobule, have a considerable lumen, and are lined by tall 

 columnar cells resting upon a second incomplete layer of small, some- 

 what flattened basket cells. 



These intralobular ducts unite at the margin of the lobule to form 

 the larger interlobular ducts, which are contained in the interlobular 

 connective tissue. Here the duct is lined by low columnar or even 

 somewhat flattened cells, at first disposed in a single, but later in a 



