Blood Composition and Functions
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Questions and Answers

What is the average number of red blood cells in men per cubic millimeter of blood?

  • 4.5 million
  • 5.0 million (correct)
  • 4.0 million
  • 6.5 million

    • Which component makes up approximately 55% of an adult's blood?

  • Plasma (correct)
  • Red blood cells
  • White blood cells
  • Platelets

    • What is the average lifespan of a red blood cell?

  • 120 days (correct)
  • 150 days
  • 90 days
  • 60 days

    • Which part of the body does not contain a nucleus in mammals' red blood cells?

    <p>Mammals</p> Signup and view all the answers

    What substance do red blood cells contain that allows them to transport oxygen?

    <p>Hemoglobin</p> Signup and view all the answers

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