Circulatory System Quiz With Answers

30 Questions | Total Attempts: 73466

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Circulatory System Quiz With Answers

Ever wondered how much do you know about the circulatory system in the human body? Then here is a Circulatory system quiz with answers for you. The circulatory system is a complex network of vital units of the body, such as blood, blood vessels, and the heart, which allows blood to circulate nutrients, oxygen, carbon dioxide, etc. To and from the cells so that the body can properly function. Let's start with this quiz; it will give you the different functions of the human circulatory system and find out how much you know about it!


Questions and Answers
  • 1. 
    The heart has how many chambers?
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4

    • E. 

      5

  • 2. 
    The right side of the heart pumps the blood _____ the heart ______ the lungs.
    • A. 

      To, from

    • B. 

      From, to

    • C. 

      To, to

    • D. 

      From, from

  • 3. 
    Plasma is about _____ percent water.
    • A. 

      60

    • B. 

      70

    • C. 

      80

    • D. 

      90

    • E. 

      95

  • 4. 
    The circulatory system is composed of:
    • A. 

      The heart, blood, and blood vessels.

    • B. 

      The heart, the brain, and the lungs.

    • C. 

      The lungs, the blood, and the blood vessels.

    • D. 

      The brain, the heart, and the blood vessels.

  • 5. 
    The heart is located near the center of your:
    • A. 

      Stomach

    • B. 

      Head

    • C. 

      Chest

    • D. 

      Back

  • 6. 
    The heart is about the size of your:
    • A. 

      Leg

    • B. 

      Brain

    • C. 

      Arm

    • D. 

      Fist

  • 7. 
    What divides the left side of the heart from the left side?
    • A. 

      Septum

    • B. 

      Atrium

    • C. 

      Ventricles

    • D. 

      Wall

  • 8. 
    When in the lungs, the __________ leaves the blood.
    • A. 

      Oxygen

    • B. 

      Carbon Dioxide

    • C. 

      Nitrogen

    • D. 

      Phosphorus

  • 9. 
    What is the largest blood vessel?
    • A. 

      Aorta

    • B. 

      Artery

    • C. 

      Capillary

    • D. 

      Veins

  • 10. 
    Where do arteries carry blood?
    • A. 

      To the heart.

    • B. 

      Away from the heart.

  • 11. 
    What is the smallest blood vessel?
    • A. 

      Arteries

    • B. 

      Capillaries

    • C. 

      Veins

  • 12. 
    What links the arteries to the veins?
    • A. 

      Muscle

    • B. 

      Capillaries

    • C. 

      Aorta

  • 13. 
    Where do the veins carry blood to?
    • A. 

      To the heart.

    • B. 

      Away from the heart.

  • 14. 
    What happens when blood pools in the veins?
    • A. 

      You fall over.

    • B. 

      You become paralyzed.

    • C. 

      You get varicose veins.

  • 15. 
    Where is plasma found?
    • A. 

      In blood.

    • B. 

      In urine.

    • C. 

      In your brain.

    • D. 

      In your muscles.

  • 16. 
    What is the most common type of blood cells?
    • A. 

      White blood cells

    • B. 

      Platelets

    • C. 

      Red blood cells

  • 17. 
    Red blood cells transport ______.
    • A. 

      Oxygen

    • B. 

      Carbon dioxide

    • C. 

      Nitrogen

    • D. 

      Hydrogen

  • 18. 
    What color are white blood cells?
    • A. 

      White

    • B. 

      Red

    • C. 

      Yellow

    • D. 

      Colorless

  • 19. 
    White blood cells contain a _______, while red blood cells do not.
    • A. 

      Nucleus

    • B. 

      Brain

    • C. 

      Red color

    • D. 

      Hemoglobin

  • 20. 
    Which of the following is NOT a function of white blood cells.
    • A. 

      Guard against infection.

    • B. 

      Fight parasites.

    • C. 

      Attack bacteria.

    • D. 

      Carry oxygen.

  • 21. 
    What is another name for T lymphocytes?
    • A. 

      T-cells

    • B. 

      B-cells

    • C. 

      Hemoglobin

    • D. 

      Red blood cell

  • 22. 
    What is blood clotting made possible by?
    • A. 

      Platelets

    • B. 

      Hemoglobin

    • C. 

      Lymphocytes

    • D. 

      Plasma

  • 23. 
    What is the circulatory system?
    • A. 

      The system that helps your body breathe.

    • B. 

      Your body's muscles.

    • C. 

      Your body's nerves.

    • D. 

      Your body's blood transporting system.

  • 24. 
    Which of the following could be compared to soldiers?
    • A. 

      Your heart.

    • B. 

      Red blood cells.

    • C. 

      White blood cells.

    • D. 

      Your lungs.

  • 25. 
    The movement of blood through the heart and body is called circulation. True or False.
    • A. 

      True

    • B. 

      False

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