1. Lymph nodes
2. Spleen
3. Thymus
4. Tonsils
5. Bone marrow
6. Lymphatic vessels
7. Lymph
8. The lymphatic system transports lymph, a fluid containing white blood cells, throughout the body to help fight infection and disease.
9. The spleen filters blood, removes old or damaged red blood cells, and stores white blood cells and platelets.
10. A lymph node is a small, bean-shaped organ that filters lymph and traps pathogens like bacteria and viruses.
11. B
12. C
13. D
14. A
15. B
Parent Tip: Review the logic above to help your child master the concept of immune system worksheet middle school.