Across
- 1. Involved in blood clotting
- 5. smallest of a body's blood vessels
- 6. oxygen add haemoglobin
- 8. biconcave disc without nucleus
- 9. blood vessels that carry blood toward the heart
Down
- 1. is a straw-coloured liquid that makes up just over half the volume of blood
- 2. protein molecule in red blood cell
- 3. protects body from infectious disease
- 4. concave on both sides
- 7. blood vessels that carry blood away from the heart