MIXED ORAL GLANDS. igi 



containing stellate cells, and consist of both serous and mucous cells. 

 The crescents are often very large and include many cells. Only the 

 serous cells are provided with the branched intercellular secretory capil- 

 laries. The connective tissue between the tubules and lobules contains 

 many leucocytes. The nerves are arranged as described for the parotid 

 gland. The gland cells are supplied by sympathetic fibers from adjacent 

 sublingual ganglion cells, about which fibers from the chorda tympani may 

 arborize. The latter are said not to proceed directly to the gland cells. 

 Sensory nerves to the ducts may come from the lingual branch of the man- 

 dibular nerve. 



Besides the gland just described there are from 8 to 20 small separate 



Part of an excretory duct 



Lumen. 



A crescent consisting of 

 eight serous cells. 



Tangential 

 section of 

 serous cells. 



Cross section 

 with mucous 

 cells and (left) 

 thick mem- 

 brana propria. 



Connective 

 tissue. 



FIG. 216. SECTION OF A HUMAN SUBLINGUAL GLAND. X 252. 



alveolo-tubular glands closely joined to it, and described as part of the sub- 

 lingual gland. They open by separate ducts, the ductus sublinguales 

 minores. They all ( ?) consist almost exclusively of mucous cells. 



The submaxillary glands are branched alveolar glands, in part tubulo- 

 alveolar, found within the lower border of the mandible, each being drained 

 by a submaxillary duct [Wharton's] which opens on the sides of the frenu- 

 lum linguae near its front margin. Its orifice may be lined by stratified 

 epithelium, but this soon gives place to the two layered form. Secretory 

 ducts are well developed (Fig. 217) and their striated cells contain a yellow 

 pigment. The intercalated ducts, which are lined with simple cuboidal 

 epithelium, lead to terminations of two sorts. Most of these consist en- 



