Parasites as biological models.
D000818:Animals; D001200:Ascaris / Q000166:cytology; D002454:Cell Differentiation; D004446:Echinococcus / Q000254:growth & development / Q000276:immunology; D008954:Models, Biological; D009119:Muscle Contraction; D010271:Parasites / Q000276:immunology; D013621:Taenia / Q000254:growth & development*