Fig. 27. Ciliary body stroma under the processes, anterior pars plicata. Even at age 19, the basement membrane is thick. Collagen and other fine filaments fill the narrow space between epithelium and fenestrated capillary wall (C). Inset. Arrowheads indicate fenestrae in wall. Clumps of tubular microfibrils (MF) of the elastic system are closely associated with the capillary wall. (X 17,300; inset, X 43,000)