Fine structure of photoreceptor cells in the earthworm, Lumbricus terrestris.
D000818:Animals; D000845:Annelida / Q000166:cytology*; D002490:Central Nervous System / Q000166:cytology; D002923:Cilia; D003593:Cytoplasm; D004847:Epithelial Cells; D008027:Light; D008854:Microscopy, Electron; D009420:Nervous System / Q000166:cytology; D009457:Neuroglia; D011984:Sensory Receptor Cells / Q000166:cytology*; D012867:Skin / Q000166:cytology; D013194:Staining and Labeling