558 THE ORGANS 



(4) The litreous memhrane (Fig. 367, g) is a clear, apparently 

 structureless membrane about two microns thick. Its outer surface 

 is grooved by the capillaries of the choriocapillaris, while its inner 

 surface is pitted by the retinal epithelium. 











' fl.n.n- 



Fig. 369. — Section of Human Cornea cut Tangential to Surface — X350 (technic 9, p. 

 97) — showing corneal cell spaces (lacunae) and anastomosing canaliculi. 



The Ciliary Body. — This is the anterior extension of the chorioid 

 and consists of the ciHary processes and the ciliary muscle (Fig. 371). 

 It extends from the ora serrata (a wavy edge which marks the anterior 



":k^%?-; / 



/ .." ( .,=.-■•">, -^tr. X :■. i_ 



■ ^. i.-V. -'-pi' .,-' — ' >.« / ■; N r 



/' .'■ ""^•••r~- -.-. ' .■•-4 ,>--^i;{iip.''" "~': 



/ '' / / ■■-■■/•-... I \ " — *A?t"\ ' 



7 -v / ■■— ■ 4 ""■•- — 4 J : ■ 





Fig. 370. — Section of Human Cornea cut Tangential to Surface — X3S0 (technics, p. 

 97) — showing ccrneal cells and their anastomosing processes. 



limit of the nervous elements of the retina — see Retina) to the margin 

 of the iris (see below). 



The ciliary processes (Fig. 371), from seventy to eighty in number, 



