350 



MANUAL OF HISTOLOGY. 



Fig. 338. Transverse section through the mu- 

 cous membrane of the small intestine of a 

 rabbit (near the surface), a, reticular con- 

 nective substance containing lymph cells; 5, 

 lymph canal ; c, transverse section of a follicle 

 of Lieberkuhn; d, another of the latter with 

 its cells in situ; e, /, g, blood-vessels. 



counterparts again ariong those lining glands. On account of the physio- 

 logical calls made on them, however, they require greater volume than 



simple epithelial elements. For this 

 reason we miss among them the ex- 

 tremely flattened scales of many 

 pavement epithelia, and meet, on 

 the other hand, as a rule, more cubi- 

 cal forms, which display, however, 

 considerable diversity to the manner 

 in which they are fitted in among 

 their neighbours. Ciliated gland cells 

 are never met within thehumanbody, 

 if we except those of the gland -fol- 

 licles of the uterus, and are but of 

 rare occurrence elsewhere. Deposits 

 of melanin likewise are never seen 

 here, although granules of yellow 

 and brown pigment are not so rare. 

 Small spheroidal or completely 

 spherical cells, first of all are to be 

 found for instance in the ovary, clothing its capsules and larger ones in the 

 sebaceous glands of the skin and meibomian of the eyelids. The gland 



cell may frequently re- 

 semble very closely, when 

 seen from above, one of 

 the elements of flattened 

 epithelium, its body having 

 become widened out. It 

 is in this form that the 

 cells lining the peptic 

 glands of the stomach are 

 presented to us (fig. 336), 

 and also those of the liver 

 (fig. 337), with many 

 others. Another species is 

 the more or less cylindrical 

 cell. This is to be seen 

 in the uterine glands, the 

 so-called tubular mucous 

 glands of the stomach, and 

 racemose glands of mucous 

 membranes (Schlemmer, 

 Puky Akos, ScJiwalbe), 

 and in Lieberkuhn's fol- 

 licles of the small intestine 

 (fig. 338, d). In the latter, 

 according to Schuhe, the 

 most exquisite examples of 



Fig. 339. Gland capillaries from the pancreas of a rabbit, filled 

 with Berlin blue (after Saviotti). 1 and 2, a large excretory 

 duct; 6, that of an acinus; c, finest capillary passages; 3, 



'beaker cells" are to be 

 seen between the ordinary 

 columnar elements. 



We have recently been 

 made acquainted with the fact that in certain glands there exist two 



an acinus with cells, and gland capillaries only partially 



