Chapter 3.4 (Biology, Grade 7)

How does blood circulate in the body?

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Chapter topics:

  1. How does blood circulate in the body?
  2. Introduction
  3. What is closed circulatory system?
  4. Test or research
  5. Fish have single circulatory system
  6. Bonus: Fast swimmers
  7. Terrestrial vertebrates have double circulatory system
  8. The circulatory system of amphibians and reptiles
  9. Bonus: Why can some reptiles move faster than amphibians?
  10. The circulatory system of birds and mammals
  11. Questions and tasks
  12. Important terms
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