Science 6 · Unit 1: The human body · Cambridge Primary Science Stage 6

Questions

1. 1. What are the three main parts of the circulatory system?

   • the lungs, windpipe and diaphragm
   • the brain, nerves and skin
   • the stomach, intestines and mouth
   • the heart, blood vessels and blood
   Check

2. 2. What does the circulatory system carry to all parts of the body?

   • undigested food
   • food and oxygen
   • carbon dioxide only
   • air bubbles
   Check

3. 3. What is the heart?

   • a special muscle that pumps blood
   • a bone that protects the lungs
   • a blood vessel
   • an organ that makes air
   Check

4. 4. What is the process of the heart pumping blood through the body called?

   • reproduction
   • respiration
   • circulation
   • digestion
   Check

5. 5. Where does the right side of the heart pump blood?

   • to the stomach
   • to the brain only
   • to the whole body
   • to the lungs only
   Check

6. 6. What does the left side of the heart pump?

   • blood without oxygen to the lungs
   • blood containing oxygen to the whole body
   • food to the stomach
   • air to the lungs
   Check

7. 7. Which blood vessels carry blood away from the heart?

   • capillaries
   • the windpipe
   • arteries
   • veins
   Check

8. 8. Which blood vessels carry blood back towards the heart?

   • arteries
   • intestines
   • veins
   • capillaries
   Check

9. 9. Why do capillaries have very thin walls?

   • so they can pump
   • to make them stronger
   • to stop blood leaking
   • so oxygen and food can move through them to the body
   Check

10. 10. Which waste gas does the blood carry to the lungs?

    • helium
    • nitrogen
    • oxygen
    • carbon dioxide
    Check

11. 11. Why does the heart pump blood to the lungs before the rest of the body?

    • to get food
    • to cool it down
    • to get rid of oxygen
    • to pick up oxygen first
    Check

12. 12. What causes your pulse?

    • the pressure of the blood as the heart pumps it
    • your lungs filling with air
    • your muscles moving
    • your stomach digesting
    Check

13. 13. Where are two good places to find your pulse?

    • the side of your neck and the inside of your wrist
    • your hair and nails
    • your knee and elbow
    • your back and stomach
    Check

14. 14. Why does your heart beat faster when you run?

    • It is cold.
    • Your heart gets tired.
    • Your body needs more food and oxygen.
    • Your body needs less oxygen.
    Check

15. 15. Marcus's pulse: sitting 72, running 120, football 150, digging 80, cycling 110. When was it lowest?

    • playing football
    • sitting still
    • riding a bicycle
    • running on the spot
    Check

16. 16. How does a child's heart rate compare to an adult's?

    • A child's heart doesn't beat.
    • A child's is faster - about 90 beats a minute compared with 70.
    • They are exactly the same.
    • A child's is slower.
    Check

17. 17. Who explained in 1628 that the heart pumps blood in one direction around the body?

    • Isaac Newton
    • Marcello Malpighi
    • William Harvey
    • Galen
    Check

18. 18. Who first saw capillaries with a microscope?

    • Marcello Malpighi
    • Galen
    • Ibn al-Nafis
    • William Harvey
    Check