Fig. 39 Müller cells (M) at the level of the inner nuclear layer; at top right and left are large lateral branches that completely envelop the neural elements. The smaller dark nucleus at the lower left belongs to another Müller cell. The cytoplasm of the Müller cells of this area contains mitochondria, microtubules (arrowhead), microfilaments, profiles of smooth endoplasmic reticulum, and some glycogen granules. N, nucleus (original magnification ×6000).