Fig. 20. Ultrastructure of human hyalocyte. A mononuclear cell is seen embedded within the dense collagen fibril (black C) network of the vitreous cortex. There is a lobulated nucleus (N) with a dense marginal chromatin (white C). In the cytoplasm, there are mithochondria (M), dense granules (arrows), vacuoles (V), and microvilli (Mi). (×11,670.) (Courtesy of Joe Craft and Dan Albert, MD)