Quiz  /  Circulatory system Class 9 MCQ Questions With Answers

  • 1. 
    What does blood do?

  • Carries Water to cells
  • Carries Oxygen to cells
  • Carries Food to cells
  • All of the above

  • 2. 
    Veins carry oxygen poor blood back to the heart.

  • False
  • True

  • 3. 
    What function does the heart do?

  • Protects organs and produces red blood cells.
  • Generates heat.
  • Breaks down food into nutrients.
  • The heart is a pump, which moves the blood. The arteries and veins are the pipes where the blood flows.

  • 4. 
    What do Red-Blood cells do?

  • Carry oxygen from the lungs to the body cells and  transport carbon dioxide from the cells back to the lungs
  • keeps blood flowing in one direction to the heart and prevent blood from flowing backwards
  • Collects  blood from the capillaries and drain it into the veins
  • Bring nutriients to the cells and carries away waste materials.

  • 5. 
    How many types of blood vessels are in our body?

  • 1
  • 2
  • 3
  • 4

  • 6. 
    Arteries carry oxygen rich blood away from the heart.

  • True
  • False

  • 7. 
    What is the heart ?

  • meaty organ
  • a small metal spike with a broadened flat head,
  • organ of soft nervous tissue
  • muscular organ

  • 8. 
    What is the Circulatory System also known as?

  • The heart
  • Cardiovascular System
  • Nervous System
  • Aorta

  • 9. 
    What does Deoxygenated mean?

  • Oxygen-rich
  • Blood flow
  • Oxygen-poor
  • Water Flow

  • 10. 
    ______________ are the smallest blood vessels.

  • Arteries
  • Veins
  • Capillaries

  • 11. 
    As the heart becomes stronger, resting heart rate

  • decreases
  • increases
  • remains the same
  • All of above

  • 12. 
    Receives oxygen-rich blood from the lungs

  • Right Ventricle
  • Left Ventricle
  • Right Atrium
  • Left Atrium

  • 13. 
    Receives blood from the body that is low in oxygen and high in carbon dioxide

  • Right Atrium
  • Right Ventricle
  • Left Atrium
  • Left Ventricle

  • 14. 
    How many chambers of the heart are there?

  • 25
  • 4
  • 2
  • 3

  • 15. 
    Formed in the bone marrow, they are small cells that have important function of clotting of the blood

  • white blood cells
  • red blood cells
  • platelets
  • leukocytes

  • 16. 
    The amount of blood pumped from the heart in one beat is

  • stroke volume
  • cardiac output
  • resting heart rate
  • maximum heart rate

  • 17. 
    Veins

  • carry deoxygenated blood to the heart
  • carry deoxygenated blood away from the heart
  • carry oxygenated blood to the heart
  • carry oxygenated blood away from the heart

  • 18. 
    Identify the structure the arrow is pointing to

  • right atrium
  • right ventricle
  • left atrium
  • left ventricle

  • 19. 
    When the cardiac muscle is trained, the cardiac output will

  • decrease
  • increase
  • stay the same
  • None of these

  • 20. 
    Pumps the oxygen-rich blood to all parts of the body

  • Right Ventricle
  • Left Ventricle
  • Right Atrium
  • Left Atrium

  • 21. 
    Blood is made up of

  • Plasma
  • Blood cells - red and white
  • Platelets
  • All of the above
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