immune system

2. totally or partially resistant to a particular infectious disease
4. engulfing and destroying foreign particles,
5. a type of white blood cell that play a crucial role in the adaptive immune system
6. abdominal organ involved in the production and removal of blood cells
10. blood cell that play a crucial role in the body's immune system
12. a soft, spongy tissue found inside most bones responsible for producing blood cells white blood cells
13. type of white blood cell play a crucial role in the immune system
16. small proteins secreted by immune cells that play a crucial role in regulating immune responses
17. network of cells, tissues, and organs that works to protect the body
19. acting as a physical barrier and an active immune organ by containing immune cells
20. immunity that is acquired through external interventions

1. specialized cells that play a crucial role in protecting the body from infections
3. the process of administering a vaccine containing a weakened or inactive form of a pathogen
7. A type of white blood cell that surrounds and kills microorganisms
8. protection you develop when your body fights off an infection
9. trains and matures T-lymphocytes
11. Filter lymph fluid, which carries white blood cells and other immune components
14. proteins produced by the immune system
15. an infectious microbe consisting of a segment of nucleic acid surrounded by a protein coat
18. vital role in defending the body against infections