Circulatory system

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Across
  1. 4. ______other word for heart beats per second
  2. 6. a muscular organ about the size of your fist
  3. 8. a tube that tranport blood
  4. 10. we need oxygen,_________ and water
Down
  1. 1. a system that transport water,oxygen and digestedfoodheart
  2. 2. heart rate depends on age and_____
  3. 3. ____________and waste materials are removed
  4. 5. heart rate depends on health and_____
  5. 7. a red substance
  6. 9. a sound when your heart beats