322 



THE HUMAN BODY. 



plex ; although but -$ inch in thickness it presents ten dis< 

 tinct layers. 



FIG. 89. A section through the retina from its anterior or inner surface, 1 

 in contact with the hyaloid membr ine, to its outer, 10, in contact with the cha 

 roid. 1, internal limiting membrane; 2, nerve-fibre layer; 3, nerve-cell layer; 4, 

 inner molecular layer; 5, inner granular layer; 6, outer molecular layer; 7, 

 outer granular layer; 8, external limiting membrane; 9, rod and cone layer; 10", 

 pigment-cell layer. 



Beginning (Fig. 89) on its front or inner side we find, 



