Rags to Riches: Answer questions in a quest for fame and fortune.

The Circulatory System

In this activity, you have to answer questions about the circulatory system. Each question will have a choice of four different answers. In order to move ahead in the game you must choose the correct answer. Good Luck and Have Fun!!

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What happens to the heart when muscles work harder?

  the heart gets tired
  the heart pumps blood slowly so the muscles can relax
  the heart pumps blood faster so the muscles get more oxygen
  the heart slows down

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