B Lymphocytes (B cells)

Learn more: http://www.khanacademy.org/video?v=Z36dUduOk1Y
Overview of B cells (B lymphocytes) and how they are activated and produce antibodies

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Length: 11 minutes

Professional Antigen Presenting Cells (APC) and MHC II complexes

Length: 20 minutes

Helper T Cells

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Cytotoxic T Cells