title: The worm returns.
mesh_terms: D000818:Animals; D001921:Brain / Q000166:cytology* / Q000502:physiology; D017173:Caenorhabditis elegans / Q000166:cytology* / Q000502:physiology*; D005260:Female; D008297:Male; D009474:Neurons / Q000166:cytology* / Q000502:physiology*; D012727:Sex Characteristics; D012726:Sexual Behavior, Animal / Q000502:physiology*