Human Circulatory System, Functional

Demonstrate students the circulatory system in action with this working model. Simply squeeze the simple bulb "pump" to send the dyed liquid through the four-chambered heart and plastic "vessels". The venous tubing is tinted blue to differentiate between oxygeted and non-oxygeted blood. Dye and syringe are included to refill the system. The one piece model is mounted on a base with numbered Key Card.