Blood Cells!

2. Blood cells that are responsible for triggering the adaptive immune response.
5. The alternate form of 13 Across when found in bone marrow or blood vessels.
6. The rarest type of blood cell that releases histamine to increase permeability of blood vessels.
8. The most common type of white blood cell.
9. A type of lymphocyte that records instances of infection by specific antigens.
12. Fragments of blood cells responsible for causing scabbing.
13. Another common phagocyte that is capable of presenting antigens.
14. A blood cell present in adaptive immune responses that releases liposomal granules to destroy pathogens.
15. Blood cells that carry oxygen.

1. A roaming lymphocyte that can destroy cells without requiring prior sensitisation.
3. An extremely rare type of phagocyte that specialises at dealing with parasitic infections.
4. An insoluble protein present in scabs.
7. A large blood cell that produces platelets.
10. The type of T cell responsible for preventing immune responses on non-foreign substances.
11. Blood cells that engulf and destroy foreign cells.