Biology

2. all the lymphatic vessels together
8. these dots purify the lymph by removing pathogens
11. vessels containing lymph
13. the classification of your blood
14. proteins that disable a pathogen
15. an allergic reaction that swells up mucous membranes
17. incapable of being sick to a certain disease
18. a substance containing water with dissolved substances and white blood cells

1. a mechanism in your body that protects your body from catching a disease
3. receiving blood from a donor
4. a protein on the outside of a virus
5. something that doesn't belong in your body
6. antigen that occurs on the cell membrane or fed blood cells.
7. a disease caused by the wrong bacteria
9. from the outside
10. the fluid outside the capillaries
12. a syringe containing dead pathogens to make you more immune to certain diseases
16. immunity caused by catching the disease