Every day billions of tiny invaders called pathogens want to make our bodies their new homes. Luckily, we have a powerful army of specialized organs, cells, and tissues that work together to protect us. This is your body's immune system. Within this complex system is type of lymphocyte called a T-cell. This video will introduce you to Helper and Cytotoxic T-cells, and describe the mechanism by which they are activated when encountered by a pathogen. If you wish to know more about this remarkable process, make sure to stay tuned so we can demystify T-cells together!
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