Students manipulate the inner workings of the human body as they build the models, gaining a deeper understanding of how organs and systems interact. Perfect for human body centers focusing on major organs or the circulatory, nervous or skeletal systems. Each realistically detailed plastic model includes a display stand and guide with facts and step by step, photo-illustrated assembly instructions. Features superior vena cava, inferior vena cava, right atrium, tricuspid valve, right ventricle, pulmonary valve, pulmonary artery, left atrium, mitral valve, left ventricle, aortic valve and aorta opens when assembled so students can explore from the inside. 29-piece model measures 5"H when assembled. Grades 3 and up.