Across
- 4. - a cell in the blood that carries oxygen using hemoglobin
- 5. - the movement of blood throughout the body
- 7. - the muscular organ that pumps blood throughout the body
- 11. - a flap in the heart and veins that keeps blood flowing in one direction
- 14. - when blood flow to part of the heart is blocked, causing damage
- 15. - a protein in red blood cells that carries oxygen
- 17. - a waste gas carried by the blood from the body back to the lungs
- 19. - the vein that brings oxygen-rich blood from the lungs to the heart
- 20. - a gas carried by the blood to cells for energy
Down
- 1. - a small cell fragment that helps the blood clot and stop bleeding
- 2. - a blood vessel that carries blood away from the heart
- 3. - the artery that carries blood from the heart to the lungs
- 6. - the smallest type of blood vessel where oxygen and nutrients pass to cells
- 8. - high blood pressure that can damage the circulatory system over time
- 9. - a cell in the blood that fights infections and protects the body
- 10. - the largest artery in the body that carries blood from the heart to the rest of the body
- 12. - a blood vessel that carries blood toward the heart
- 13. - the yellowish liquid part of blood that carries cells and nutrients
- 16. - a fatty substance that can clog arteries if there’s too much in the blood
- 18. - the fluid that carries oxygen, nutrients, and waste through the body