KS2 Science Quiz - The Human Circulatory System (Questions)

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.

1. The human circulatory system includes the heart, lungs and blood vessels. What is another name for the circulatory system ?
[ ] The endocrine system
[ ] The cardiovascular system
[ ] The nervous system
[ ] The digestive system
2. The heart pumps blood to the lungs. What waste product is removed from the blood by the lungs?
[ ] Oxygen
[ ] Acid
[ ] Carbon dioxide
[ ] Urea
3. What enters the blood from the lungs?
[ ] Oxygen
[ ] Acid
[ ] Carbon dioxide
[ ] Urea
4. Where does the heart pump oxygenated blood to?
[ ] To the brain only
[ ] To the lungs only
[ ] To the digestive system only
[ ] To the whole body
5. Blood delivers oxygen and what else to the cells in your body?
[ ] Carbon dioxide
[ ] Energy
[ ] Essential nutrients
[ ] Kind thoughts
6. Which one of the following is not part of the heart?
[ ] Right ventilator
[ ] Septum
[ ] Right atrium
[ ] Left ventricle
7. Waste products must be removed before the blood returns to the heart. Which organs remove waste from the blood?
[ ] The brain and spleen
[ ] The liver and kidneys
[ ] The skin and gall bladder
[ ] The liver and spleen
8. Which blood vessels carry oxygenated blood?
[ ] Arteries
[ ] Veins
[ ] Capillaries
[ ] All of the above
9. Which are the thinnest and smallest blood vessels?
[ ] Arteries
[ ] Veins
[ ] Capillaries
[ ] None of the above
10. What is the easiest way to measure your heart rate?
[ ] By seeing how many sit-ups you can do in 30 seconds
[ ] By counting your breaths
[ ] By listening to your heartbeats
[ ] By checking your pulse rate

 

KS2 Science Quiz - The Human Circulatory System (Answers)
1. The human circulatory system includes the heart, lungs and blood vessels. What is another name for the circulatory system ?
[ ] The endocrine system
[x] The cardiovascular system
[ ] The nervous system
[ ] The digestive system
'Cardio' means 'heart' and 'vascular' refers to the blood vessels
2. The heart pumps blood to the lungs. What waste product is removed from the blood by the lungs?
[ ] Oxygen
[ ] Acid
[x] Carbon dioxide
[ ] Urea
Carbon dioxide is sometimes written as CO2
3. What enters the blood from the lungs?
[x] Oxygen
[ ] Acid
[ ] Carbon dioxide
[ ] Urea
Carbon dioxide leaves the body and oxygen enters
4. Where does the heart pump oxygenated blood to?
[ ] To the brain only
[ ] To the lungs only
[ ] To the digestive system only
[x] To the whole body
All the living cells in our bodies need oxygen in order to work
5. Blood delivers oxygen and what else to the cells in your body?
[ ] Carbon dioxide
[ ] Energy
[x] Essential nutrients
[ ] Kind thoughts
Blood then takes on the waste materials from the cells, including carbon dioxide - it is a highly-efficient delivery system!
6. Which one of the following is not part of the heart?
[x] Right ventilator
[ ] Septum
[ ] Right atrium
[ ] Left ventricle
Your heart is divided by the septum into two sides - each side is divided into an atrium and ventricle
7. Waste products must be removed before the blood returns to the heart. Which organs remove waste from the blood?
[ ] The brain and spleen
[x] The liver and kidneys
[ ] The skin and gall bladder
[ ] The liver and spleen
The waste is passed out of the body when you go to the toilet
8. Which blood vessels carry oxygenated blood?
[x] Arteries
[ ] Veins
[ ] Capillaries
[ ] All of the above
Veins carry deoxygenated blood back to the heart
9. Which are the thinnest and smallest blood vessels?
[ ] Arteries
[ ] Veins
[x] Capillaries
[ ] None of the above
The walls of capillaries are only one cell thick!
10. What is the easiest way to measure your heart rate?
[ ] By seeing how many sit-ups you can do in 30 seconds
[ ] By counting your breaths
[ ] By listening to your heartbeats
[x] By checking your pulse rate
Your pulse rate rises after you've been active for a short time