Respiratory and circulatory systems

Explores the respiratory and circulatory systems of the human body. Beginning with the respiratory system, the complex process of breathing is explored. Animated graphics depicts the passage of oxygen from the nose to the lungs where the exchange of oxygen and carbon dioxide occurs. Describes the functions of cardiovascular system, examining the function of the heart, blood, and blood vessels. Also discusses the importance of diet and exercise in maintaining the health of the respiratory and circulatory systems.