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