Across
- 3. a tiny blood vessel
- 5. a waste product in the blood that comes from the breakdown of proteins
- 6. blood carries this to our cells
- 8. a blood cell that carries oxygen throughout the body
- 9. – a blood vessel that carries blood away from the heart.
- 11. the muscular organ that pumps blood throughout the body
- 13. this type of circulation is the flow of blood between the heart and cells of the body.
- 14. – structures that open and close to control blood flow through the heart
Down
- 1. - either of the two upper chambers of the heart that receives blood from veins.
- 2. – a small blood cell that helps the blood to clot
- 4. – the artery that carries blood from the right ventricle to the lungs
- 7. either of the two lower chambers of the heart that pumps blood through
- 10. a blood vessel that carries blood to the heart
- 12. a blood cell that fights infection by destroying microscopic, disease causing organisms