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  1. The immune system: Cells, tissues, function, and disease

  2. Cells of Immune System- Types and Examples - Microbe Notes

  3. Immune System Function, Conditions & Disorders - Cleveland Clinic

  4. 11.1A: Cells and Organs of the Immune System - Biology LibreTexts

  5. Immune system | Description, Function, & Facts | Britannica

  6. In brief: How does the immune system work?

  7. Overview of the Immune System - Overview of the Immune System

  8. The Immune System - Johns Hopkins Medicine

  9. The components of the immune system - Immunobiology - NCBI …

  10. 21.1 Anatomy of the Lymphatic and Immune Systems