title: Ultrastructural evidence for the presence of nerve cells in the gastrodermis of Hydra.
mesh_terms: D000818:Animals; D002466:Cell Nucleolus; D002467:Cell Nucleus; D002843:Chromatin; D002923:Cilia; D004721:Endoplasmic Reticulum; D006056:Golgi Apparatus; D006829:Hydra / Q000033:anatomy & histology*; D002479:Inclusion Bodies; D008854:Microscopy, Electron; D008870:Microtubules; D008928:Mitochondria; D009474:Neurons / Q000166:cytology*; D009489:Neurosecretion; D009490:Neurosecretory Systems / Q000166:cytology*; D012270:Ribosomes
chemical_list: D002843:Chromatin