Spontaneous and induced experimental animal model. Directive 63-2010 on the protection of animals used for scientific research. Surgical procedures on experimental animals. Experimental models of hypertension. Experimental models for the study of heart medicines. Methodologies for the study of drugs with analgesic, anti-inflammatory, antiulcer, diuretic, choleretic and laxative activity. Methods used for the study of learning, motor skills, anxiety and depression.