Vocal cords, lungs, heart, red and white blood cells, arteries, veins, and more -- how can so many parts and pieces work together so smoothly? Respiration and Circulation presents an exciting opportunity to readily grasp topics that may seem, at first, too complicated to understand. Clearly labeled illustrations help readers visualize and simplify the processes involved in breathing and the transportation of blood to every cell -- and put essential knowledge of the human body quickly and easily into their hands.