116 



THE ESSENTIALS OF HISTOLOGY. 



laries), there is nothing but the epithelium remaining, and the cells of 

 this are frequently not more elongated in one direction than in another, 

 but have a characteristic wavy outline (fig. 142). 



FIG. 141. LYMPHATIC PLEXUS OF CENTRAL TENDON OF DIAPHRAGM OF RABBIT, 

 PLEURAL SIDE. (Klein.) 



ft, larger vessels with lanceolate cells and numerous valves ; b, c, lymphatic capillaries 

 with wavy-bordered cells. 



Lymphatics begin in two ways either in the form of plexuses, as in 

 membranes (fig. 141), or as lacunar interstices, as is the case in some of 

 the viscera. 



