THE FINAL SHOWDOWN! This is the last episode on the immune system and also the very last episode of Crash Course Anatomy & Physiology. In it, Hank explains how the cellular immune response uses helper, cytotoxic, and regulatory T cells to attack body cells compromised by pathogens. He also explores how cytokines activate B and T cells, and what happens if your immune system goes rogue and starts causing autoimmune trouble.

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Chapters:
Introduction: Cells Fight Cells 00:00
Professional Antigen Presenting Cells 1:46
Helper T Cells 4:00
Cytotoxic T Cells 5:23
Immunodeficiencies 6:08
Autoimmune Disorders 7:27
Review 8:26

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