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This Torso Systems Model features functioning systems intended to help students learn about body processes. In conjunction with the Teacher s Guide this highly interactive model allows students to conduct activities on the functions of each system. Nervous System: Registers sensory responses. Digestive System: Effectively ilustrates the passage of food through the body. Circulatory System: Latex heart can be pumped forcing fluid through transparent tubes representing blood vessels. Urinary System: Functioning of kidneys bladder and uretha are demonstrated. Respiratory System: Demonstrates inhalation and exhalation. Grades 3-9.