Immune System - Free Printable

Educational worksheet: Immune System. Download and print for classroom or home learning activities.

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1. Lymph nodes
2. Spleen
3. Thymus
4. Tonsils
5. Bone marrow
6. Lymphatic vessels
7. Appendix
8. Peyer’s patches

9. The lymphatic system transports excess interstitial fluid (lymph) back to the bloodstream, absorbs dietary fats from the digestive tract, and plays a crucial role in immune defense by filtering pathogens and housing immune cells.
10. The spleen filters blood, removes old or damaged red blood cells, stores platelets and white blood cells, and initiates immune responses against blood-borne pathogens.
11. A lymph node is a small, bean-shaped organ that filters lymph fluid, trapping and destroying pathogens and foreign particles using immune cells like lymphocytes.

Multiple Choice:
12. C. circulates
13. B. lymphocytes
14. D. all of the above
15. A. spleen
16. C. tonsils
17. B. thymus
18. A. lymph nodes

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