title: Electron microscopic observation of the aboral organ of Ctenophora. I. The gravity receptor.
mesh_terms: D000110:Acetylcholinesterase / Q000032:analysis; D000818:Animals; D001485:Basement Membrane; D002923:Cilia; D003063:Cnidaria / Q000166:cytology*; D007758:Ear, Inner; D006112:Gravitation; D002479:Inclusion Bodies; D008465:Mechanoreceptors / Q000201:enzymology / Q000648:ultrastructure*; D008566:Membranes; D008854:Microscopy, Electron; D008928:Mitochondria; D009434:Neural Pathways; D017981:Receptors, Neurotransmitter; D012679:Sense Organs / Q000166:cytology*
chemical_list: D017981:Receptors, Neurotransmitter; D000110:Acetylcholinesterase