Wow in the World: The Amazing Human BodyThe human body is a fascinating, mysterious and sometimes even stinky piece of machinery! Explore the extraordinary inner workings of your body with this innovative anatomical model. Its see through exterior holds a number of fun, interactive models that mechanically demonstrate how major body systems work. Assemble a simple squeeze bulb pump to circulate red dye through clear tubes, modeling the heart and circulatory system. Expand and contract a