Follow the blood (colored water) all the way through the circulatory system. This fascinating model (15" x 16" x 3") depicts blood as it flows through transparent veins, arteries, capillaries, and heart chambers. Depicts venous blood as reddish-purple and arterial blood as bright red to show the process of oxygenation of the blood. The model is mounted on baseboard with support legs and comes with teacher’s guide, red dye, and a syringe for refilling the system. An engaging teaching tool for anatomy lessons, biology classes, and more.