The Human Circulatory System
Your heart rate can be measured by checking your pulse rate.

The Human Circulatory System

The human circulatory system is a group of organs and vessels which transports blood around the body. In this KS2 Science quiz we take a closer look at its components and find out how it works.

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.

Test your knowledge of the heart, arteries, veins and more by taking this science quiz on the human circulatory system.

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  1. What enters the blood from the lungs?
    Carbon dioxide leaves the body and oxygen enters
  2. What is the easiest way to measure your heart rate?
    Your pulse rate rises after you've been active for a short time
  3. Which blood vessels carry oxygenated blood?
    Veins carry deoxygenated blood back to the heart
  4. Waste products must be removed before the blood returns to the heart. Which organs remove waste from the blood?
    The waste is passed out of the body when you go to the toilet
  5. Which are the thinnest and smallest blood vessels?
    The walls of capillaries are only one cell thick!
  6. The heart pumps blood to the lungs. What waste product is removed from the blood by the lungs?
    Carbon dioxide is sometimes written as CO2
  7. Which one of the following is not part of the heart?
    Your heart is divided by the septum into two sides - each side is divided into an atrium and ventricle
  8. Blood delivers oxygen and what else to the cells in your body?
    Blood then takes on the waste materials from the cells, including carbon dioxide - it is a highly-efficient delivery system!
  9. Where does the heart pump oxygenated blood to?
    All the living cells in our bodies need oxygen in order to work
  10. The human circulatory system includes the heart, lungs and blood vessels. What is another name for the circulatory system ?
    'Cardio' means 'heart' and 'vascular' refers to the blood vessels

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