Fine structure of the photoreceptor cells of the ground squirrel (Citellus tridecemlineatus tridecemlineatus).
D000818:Animals; D004847:Epithelial Cells; D008853:Microscopy; D008854:Microscopy, Electron; D010786:Photoreceptor Cells / Q000166:cytology*; D012160:Retina / Q000166:cytology*; D012377:Rodentia / Q000033:anatomy & histology*