Your Circulatory System

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Your Circulatory System

From the Series Searchlight Books ™ — How Does Your Body Work?

The circulatory system is made up of the heart, the blood, and strong tubes called blood vessels. But what does the circulatory system do? And how do its parts work together to keep your body… Read More →

  • Lexile: 580
  • ATOS: 4.1
  • Dewey: 612.1