Across
- 2. carry blood away from the heart
- 4. contains oxygen
- 8. a big artery that takes the blood around the body
- 9. receive blood from other parts of the body
- 13. supply body cells with oxygen and nutrients and take away waste products
- 15. pump blood out of the heart
- 16. carry blood towards the heart
- 17. the liquid part of the blood
- 18. one kind of white blood cells that engulf bacteria
- 20. the inside space of a tube-shaped organ
- 21. a substance found in urine(尿液）
- 22. a insoluble protein that forms fibres to make a mesh-like structure
Down
- 1. make sure the blood flows in the correct direction
- 3. between atria and ventricles
- 5. be able to stretch and return to its original size
- 6. a protein that carries oxygen
- 7. a process that white blood cells engulf and digest pathogens
- 10. a soluble protein in plasma that is related to blood clotting
- 11. one kind of white blood cells that produce antibodies
- 12. a component of blood which is small fragments of cells
- 14. separate the heart into right and left side
- 19. relating to the liver