Biology

3rd -

5thgrade

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Circulatory System

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  • 1. Multiple Choice
    30 seconds
    1 pt
    Which of the following is the major organ of the Circulatory System?
    Heart
    Brain
    Stomach
    Kidney
  • 2. Multiple Choice
    30 seconds
    1 pt
    True or False: Human blood is blue.
    True
    False
  • 3. Multiple Choice
    30 seconds
    1 pt
    Which of the following gives blood its color?
    Red Blood Cells
    White Blood Cells
    Plalelets
    Plasma
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