224 



THE SKIN 



a second plexus immediately underlies the first, and from these, 

 venules pass to the deeper part of the corium, whence after free 

 anastomosis they proceed to the subcutaneous tissue, collecting 

 on the way the venules returning from the hair follicles and 



FIG. 192. KECONSTRUCTION OF THE CUTANEOUS BLOOD VESSELS. 



a, epidermis ; J, derma ; c, subcutaneous tissue ; d, deep, and e, superficial arterial 



plexus;/-*, successive venous plexuses, x 9i. (After Spalteholz.) 



secreting glands, and from the subcutaneous connective tissue. 

 The very rich capillary network in the papilla of the hair bulb is 

 worthy of special mention. 



The lymphatic vessels of the skin begin as a terminal lymphatic 

 plexus in the corium, which collects the lymph from the tissue 

 spaces of both derma and epidermis. The vessels of this plexus 

 communicate with a subcutaneous lymphatic plexus of larger ves- 

 sels which follow the course of the blood vessels on their way to 

 reach the neighboring groups of superficial lymphatic glands. 



NERVE SUPPLY. The skin is abundantly supplied with large 

 nerve trunks which find their way along the subcutaneous fat and 

 send branches directly to the larger blood vessels, the hair follicles, 

 the sebaceous and sudoriparous glands, to the corpuscles Pacini, 

 Ruffini, and Golgi-Mazzoni, and to the end bulbs of Krause, which 

 lie in the connective tissue. 



In the cutis vera the nerve trunks form a plexus of delicate 

 fibre bundles in the reticular layer, with a secondary, more closely 



