218 



THE ESSENTIALS OF HISTOLOGY 



the suprachoroidea in structure, but contains the blood-vessels of the 

 coat. In its outer part are the larger vessels (arteries and veins), the 

 veins having a peculiar vorticose arrangement; in its inner part 

 (choiio-capillaris) are the capillaries, which form an extremely close 

 network with elongated meshes, the capillaries radiating from the 



FIG. 253. SECTION (FROM THE EYE OF A MAN, AGED 30), SHOWING THE 

 RELATIONS OF THE CORNEA, SCLEROTIC, AND IRIS, TOGETHER WITH THE 

 CILIARY MUSCLE, AND THE CAVERNOUS SPACES NEAR THE ANGLE OF THE 

 ANTERIOR CHAMBER. (Magnified.) 



A, epithelium ; B, conjunctiva! mucous membrane ; c, sclerotic ; D, membrana suprachoroidea ; 

 E, opposite the ciliary muscle ; F, choroid, with ciliary processes ; G, tapetum nigrum and 

 pars ciliaris retinae ; H, cornea (substantia propria) ; J, iris ; K, radiating and meridional, 

 and L, circular or annular bundles of the ciliary muscle ; M. bundles passing 1 to the 

 sclerotic ; N, ligamentum pectinatum iridis at the angle, o, of the anterior chamber ; 

 P, line of attachment of the iris. 1, anterior homogeneous lamina of the cornea : 2, posterior 

 homogeneous lamina, covered with epithelial cells which are continued over the front of 

 the iris ; 3, cavernous spaces at the angle of the anterior chamber (spaces of Fontana) ; 

 4, canal of Schlemm, with epithelial lining, and with a vessel, 5, leading from it; 6, other 

 vessels ; 7, bundles of fibres of the sclerotic having a circular direction, cut across ; 

 8, larger ones in the substance of the sclerotic ; 9, fine bundles cut across, at limit of 

 cornea; 10, point of origin of meridional bundles of ciliary muscle; 11, b'ood-vessels in 

 sclerotic and conjunctiva, cut across ; 12, section of one of the ciliary arteries. 



extremities of the small arteries and veins in a highly characteristic 

 manner (fig. 252). In the ciliary processes the vessels have for the 

 most part a longitudinal direction, but there are numerous convoluted 

 transversely disposed capillaries uniting the longitudinal vessels (fig. 255). 



