Circulatory System Quiz
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Questions and Answers

What is the primary function of capillaries in the circulatory system?

  • Transport blood away from the heart
  • Regulate blood pressure
  • Exchange nutrients and gases with cells (correct)
  • Carry waste products to the kidneys

    • What is the structure of capillary walls?

  • Lined with elastic tissue
  • Made of multiple layers of cells
  • Thick and muscular
  • One cell thick (correct)

    • Which blood vessel type connects arteries to veins?

  • Veins
  • Venules
  • Capillaries (correct)
  • Arterioles

    • In which part of the body do capillaries form dense networks?

    <p>All organs and tissues</p> Signup and view all the answers

    Which substances diffuse from capillaries to cells?

    <p>Oxygen and nutrients</p> Signup and view all the answers

    Which statement describes arteries correctly?

    <p>Arteries have a thick outer wall.</p> Signup and view all the answers

    What is the primary function of veins in the circulatory system?

    <p>To return deoxygenated blood to the heart.</p> Signup and view all the answers

    Which feature is characteristic of veins compared to arteries?

    <p>Large diameter lumen.</p> Signup and view all the answers

    Why do veins have valves?

    <p>To keep blood flowing in one direction.</p> Signup and view all the answers

    How does the blood pressure in arteries compare to that in veins?

    <p>Arteries have higher pressure than veins.</p> Signup and view all the answers

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