This Science quiz is called 'The Human Circulatory System' and it has been written by teachers to help you if you are studying the subject at elementary school. Playing educational quizzes is an enjoyable way to learn if you are in the 3rd, 4th or 5th grade - aged 8 to 11.
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There are several different systems in the human body. One of these is the circulatory system. The circulatory system transports blood to all the different parts of the body. Without it, your cells would never receive the oxygen and food they need to function. Your heart is busy beating all the time in order to pump blood through your arteries and keep it in circulation. Once it has dropped off the food and oxygen the blood is transported back to your heart through your veins. The lungs are also a part of the circulatory system. Blood is pumped to the lungs where it drops off waste carbon dioxide and picks up fresh oxygen before going around the body again.
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'Cardio' means 'heart' and 'vascular' refers to the blood vessels
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Carbon dioxide is sometimes written as CO2
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Carbon dioxide leaves the body and oxygen enters
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All the living cells in our bodies need oxygen in order to work
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Blood then takes on the waste materials from the cells, including carbon dioxide - it is a highly-efficient delivery system!
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Your heart is divided by the septum into two sides - each side is divided into an atrium and ventricle
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The waste is passed out of the body when you go to the toilet
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Veins carry deoxygenated blood back to the heart
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The walls of capillaries are only one cell thick!
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Your pulse rate rises after you've been active for a short time
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