Across
- 2. the liquid part of the blood
- 5. located in the middle of your chest and vital for circulation
- 6. carries blood away from the heart
- 7. a muscle that separates the atria and the ventricles
- 8. are produced in the thymus gland
- 10. carries blood towards the heart
- 11. receive blood from the atria
- 12. filled with incoming blood
- 13. give red blood cells the bright red look
- 14. create antibodies
Down
- 1. joins each artery and vein
- 2. breaks down quickly in the blood
- 3. recognize foreign antigens, and stimulate macrophages, B cells, and other T cells
- 4. makes up 45% of red blood cells
- 9. activated by helper T cells or presence of a foreign antigen. Kill foreign cells by puncturing a hole in their membrane.