Students use this interactive hands-on kit to attach the great vessels to the heart and use the red and blue arrows to follow the route of circulation through the heart. This colorful and engaging kit includes pieces representing the heart, vena cava, aorta, pulmonary arteries, and red and blue arrows. The kit also includes two erythrocytes (a red oxygenated one and a blue deoxygenated one) for students to move through the heart enacting circulation, switching from one to the other in the appropriate place
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