Across
- 3. a toxin or other foreign substance which includes an immune response in the body
- 6. a tube-shaped sac attached to and opening into the large intestine
- 7. the organ primarily responsible for the production and maturation of immune cells
- 8. proteins that protect you when an unwanted substance enters your body
Down
- 1. a small bean-shaped structure that is part of the lymphatic system
- 2. the soft fatty tissue inside bones that produces blood cells and platelets
- 4. the state or quality of being resistant to a particular infectious disease
- 5. a collection of the extra fluid that drains from cells and tissues