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Main Fluid Part of the Body - Blood

The Circulatory System Quiz will test your knowledge on this important part of the human body. You will be asked to answer questions about its components and functions on The Circulatory System Quiz

Main Fluid Part of the Body - Blood
  • 1 of 8:

    How does the blood from the lungs get back to the heart?

  • A) Alveoli
  • B) Pulmonary Vein
  • C) Inferior Vena Cava
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