Immunity

4. When a disease spreads rapidly across a number of countries and continents
6. Artificial active immunity which is injected
7. Y-shaped glycoproteins which bind to a specific antigen
9. enzymes in this organelle digest pathogens
11. The first milk produced by a mammalian mother which is very high in antibodies

1. Antibodies cause pathogens to clump together
2. Gland where T lymphocytes mature
3. the process of pathogens being engulfed by phagocytes
5. cell-signalling molecules which stimulate the specific immune system
8. Chemical produced by T killer cells which kills pathogen by making holes in the cell membrane
10. Chemicals which bind to pathogens and tag them so that they can be recognised by phagocytes