STRUCTURE OF NERVE- FIBEES. 89 



being composed of connective tissue and covered on both surfaces by 

 flattened epithelioid cells (fig. 107). Between the lamellae are clefts for 

 the conveyance of lymph to the lymphatics of the epineurium. The 

 delicate connective tissue which lies between the nerve-fibres of the 

 funiculus is the endoneurium (fig. 105, ed; fig. 106, En). It assists in 

 supporting the longitudinally arranged meshwork of blood-capillaries, 

 and its interstices communicate with the lymphatic clefts of the 

 perineurium. 



All the branches of a nerve, and even single nerve-fibres which are 

 passing to their distribution, are invested with a prolongation of the 

 perineural sheath, which is there known as the sheath of Henle. 



The nerve-trunks themselves receive nerve-fibres (nervi nervomm) 

 which ramify chiefly in the epineurium and terminate within this in 

 end-bulbs (Horsley). 



