Circulatory System

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Circulatory System

This is a multiple choice activity on the Circulatory System.


Questions and Answers
  • 1. 
    What is the circulatory system?
    • A. 

      The body's breathing system

    • B. 

      The body's system of nerves

    • C. 

      The body's food-processing system

    • D. 

      The body's blood-transporting system

  • 2. 
    From what source do cells get their food?
    • A. 

      Blood

    • B. 

      Oxygen

    • C. 

      Other cells

    • D. 

      Carbon dioxide

  • 3. 
    • A. 

      Oxygen helps the blood to clot.

    • B. 

      Oxygen brings food to the cells.

    • C. 

      Oxygen is necessary for cell growth and energy.

    • D. 

      Oxygen is not important -- carbon dioxide is the most important substance to the body.

    • E. 

      Oxygen enters a person's bloodstream through the lungs.The blood carries oxygen to the cells of the body. In the cells, oxygen combines with chemicals obtained from food to produce energy needed for each cell to perform its function in the body.

  • 4. 
    Why is blood that flows from the lungs to the heart bright red rather than dark red?
    • A. 

      Oxygen makes it red.

    • B. 

      Carbon dioxide makes it red.

    • C. 

      Gastric juices produce the red colour of the blood.

    • D. 

      The lungs add a pigment (dye) to blood as it flows through them.

  • 5. 
    What part of the blood carries minerals, vitamins, sugar, and other foods to the body's cells?
    • A. 

      Plasma

    • B. 

      Platelets

    • C. 

      Red corpuscles

    • D. 

      White corpuscles

  • 6. 
    • A. 

      To clot blood

    • B. 

      To fight disease

    • C. 

      To transport oxygen to the body's cells and carry away carbon dioxide from the cells

    • D. 

      To transport carbon dioxide to the body's cells and carry away oxygen from the cells

  • 7. 
    Which of the following can best be compared to soldiers?
    • A. 

      Lungs

    • B. 

      Capillaries

    • C. 

      Red blood cells

    • D. 

      White blood cells

  • 8. 
    Which element in the blood is round and colorless?
    • A. 

      Plasma

    • B. 

      Platelets

    • C. 

      Red blood cells

    • D. 

      White blood cells

  • 9. 
    What would happen to people who have an open wound and whose blood did not clot naturally?
    • A. 

      They would bleed to death.

    • B. 

      Nothing. Clotting is not important.

    • C. 

      They would have to take special clotting drugs.

    • D. 

      They would have to take regular doses of plasma.

  • 10. 
    • A. 

      You would bleed to death.

    • B. 

      A scab will form on the skin surface.

    • C. 

      Platelets stick to the edges of the cut and to one another, forming a plug.

    • D. 

      The flow of blood to tissues beyond the clot may be cut off.

  • 11. 
    What happens to blood when it is pumped into the thin-walled blood vessels of the lungs?
    • A. 

      Platelets are exchanged for plasma.

    • B. 

      Carbon dioxide is replaced with oxygen.

    • C. 

      Blood fills the lungs and causes coughing.

    • D. 

      Nothing -- the lungs are just a place blood goes through on its way back to the heart.

  • 12. 
    Why does blood turn dark red as it circulates through the body?
    • A. 

      It starts to clot.

    • B. 

      It gets old and dirty flowing through the body.

    • C. 

      The oxygen in it is replaced with carbon dioxide.

    • D. 

      The farther blood is from the heart, the more dark red it is.

  • 13. 
    How many major types of blood have scientists discovered?
    • A. 

      One: Type "O"

    • B. 

      Two: white cells and red cells

    • C. 

      Three: white cells, red cells, and plasma

    • D. 

      Four: Types A, B, AB, and O

  • 14. 
    What is the organ that pumps blood all throughout the human body?
    • A. 

      The lungs

    • B. 

      The heart

    • C. 

      The kidneys

    • D. 

      The blood vessels and capillaries