Capillaries and Cardio Physiology Quiz
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Questions and Answers

What is the diameter of capillaries compared to erythrocytes?

  • Capillaries are larger than erythrocytes
  • Capillaries are smaller than erythrocytes (correct)
  • Capillaries have no relation to erythrocytes
  • Capillaries are the same size as erythrocytes
  • What is the function of capillaries?

  • To regulate blood pressure
  • To carry oxygenated blood back to the heart
  • To allow fluids containing gases, metabolites, and waste products to move through their thin walls (correct)
  • To form blood clots
  • How many miles of capillaries does the human body contain approximately?

  • 50,000 miles (correct)
  • 25,000 miles
  • 10,000 miles
  • 5,000 miles
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