title: Unusual tubular structures in the urinary bladder of the crayfish Astacus fluviatilis.
mesh_terms: D000818:Animals; D003400:Astacoidea / Q000166:cytology*; D003594:Cytoplasmic Granules; D004847:Epithelial Cells; D006652:Histological Techniques; D008854:Microscopy, Electron; D008870:Microtubules; D009940:Organoids; D001743:Urinary Bladder / Q000166:cytology*