HISTOLOGY 



141 



covered by a connective tissue sheath. The secretion, in sections stained 

 with hematoxyUn and eosin, is intensely red and has a tendency to crack 

 and form parallel fissures. 



Epithelium 



Secretion 



Fig. 60. — \'esicular gland. 



(XI75-) 



Coagulating glands. — The branched, tubular coagulating glands 

 are lined by simple columnar epithelial cells having round, centrally 

 located nuclei and eosinophilic cytoplasm. The mucous membrane forms 

 curved longitudinal folds, some of which project far into the lumen (Fig. 

 70). Even in the distended tubules some mucous folds are almost always 



Epitbelium 



■Secretion 



Fi(,. 70. ('o;i<;ulating gland. (X200.) 



present. Each coagulating gland usually has two ducts which are lined by 

 low columnar epithelial cells having deeply staining nuclei and slightly 

 basophilic cytoplasm. Due to the folds present in the mucosa the ducts 

 of these glands have a wavy lumen on section. The gland tubules are 

 surrounded by a delicate layer of circular smooth muscle fibers and have a 

 common connective tissue covering which attaches the gland to the lesser 



