Across
- 1. Blood Cells Made in the bone marrow
- 4. Have thick muscular walls
- 6. Fluid part of blood
- 9. Prevent the blood from flowing backwards
- 10. Found in the muscles and lungs
- 11. Clump together to form clots
- 13. White blood cells produce antibodies to attack the microbe
- 14. Blood Cells Contain Haemoglobin
- 15. Separates the two sides of the heart
Down
- 2. Contains a red substance
- 3. Have thin walls
- 5. Type of carbohydrate
- 7. Small air sacs
- 8. Chemical Reaction that happens in all living cells
- 12. Is something so small you need to see it with a microscope
- 15. A physical barrier