The Relationship Between Intensity Of Exercise And Heart Rate

1236 WordsAug 29, 20145 Pages
AIM: To determine the relationship between intensity of exercise and heart rate. BACKGROUND RESEARCH: The circulatory system comprises of five main parts. These parts are; the Heart, Arteries, Arterioles, Capillaries and Veins. Each part has a specific role to play in the functioning of the circulatory system. The circulatory system works in a type of loop or closed system (www.about.com) (Craig Weber M.D). The circulatory system is a vast network and is responsible for the flow of blood, nutrients, oxygen and other gases, and hormones to and from cells. The heart pumps oxygen rich blood from the lungs to all parts of the body through a network of tubes called arteries, and smaller branches within the system called arterioles. The blood is then returned to the heart through small vessels called venules and then into larger tubes called veins. Further along the closed loop of the circulatory system are capillaries, and it is here that the exchange of oxygen and carbon dioxide between blood and body cells take place (mrbenton.com). All cells in the body need to have oxygen and nutrients, and they also need their wastes removed. These are the main roles of the circulatory system. The heart, blood and blood vessels work together to service the cells of the body. Using the network of arteries, veins and capillaries, blood carries carbon dioxide to the lungs (for exhalation) and picks up oxygen. The same liquid can be continuously pumped through the circulatory system over
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