BASEMENT OR PRIMARY MEMBRANE. 



127 



Nerves (Fig. 13), except the Conjunctiva! membrane and the Mucous 

 membrane of the mouth and nose ; hence the sensibility of the internal 



Fig. 9. 



Fig. 10. 



Distribution of Capillaries at the surface 

 of the skin of the finger. 



Distribution of Capillaries in the Villi of 

 the Intestine. 



mucous membrane is usually low, although its importance in the organic 

 functions is so great. The Skin is copiously supplied with Lymphatics ; 



Fig. 11. 



Fig. 12. 



Distribution of Capillaries around follicles 

 of Mucous Membrane. 



Distribution of Capillaries around the follicles 

 of Parotid Gland. 



and the first part of the alimentary canal with Lacteals ; some of the 

 glandular organs are also largely supplied with Lymphatics. The 



Fig. 13. 



Distribution of the tactile nerves at the extremity of the human thumb, as 

 seen in a thin perpendicular section of the skin. 



Areolar tissue, whether existing separately, or forming a part of the 

 Serous and Mucous Membranes, is capable of being very quickly and 

 completely regenerated ; indeed, we often find that losses of substance 

 in other tissues are replaced by means of it. 



3. Of the Basement or Primary Membrane. 



206. In many parts of the Animal body, we meet with membranous 

 expansions of extreme delicacy and transparency, in which no definite 



