cardiovascular

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Across
  1. 3. connects the arteries and veins
  2. 6. transports blood away from the heart
  3. 8. interacts with this system because in the bloodstream but also fight against infection.
  4. 12. brings nutrient-depleted blood to the lungs and nutrient-rich blood back to the heart
  5. 13. transport blood back to the heart
  6. 14. main organ in the system and pumps blood
  7. 15. hollow tubes for carrying blood
Down
  1. 1. brings nutrient-rich blood to tissues and organs
  2. 2. a fluid that transports nutrients and waste throughout the body
  3. 4. to transport nutrients to cells
  4. 5. arteries that surround the heart
  5. 7. interacts with this system by receiving oxygen from the lungs
  6. 9. interacts with this system by having blood cells made in bone marrow
  7. 10. an involuntary muscle found in the heart
  8. 11. structures within the heart that regulate blood flow