False-colour TEM of a human lymphocyte

False-colour TEM of a human lymphocyte

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Credit: CNRI/SCIENCE PHOTO LIBRARY

Caption: False-colour transmission electron micrograph (TEM) of a lymphocyte, a type of white blood cell involved in the body's specific immune response. There are two main types of lymphocytes; T-cells and B-cells. T-cells (thymus-derived) give rise to a cell-mediated response, tracking down and destroying antigens directly (as cytotoxic or killer T-cells) or through summoning & directing the scavenging macrophages. B-cells (bone marrow derived) mount the humoral immune response through the secretion of antigen-specific antibodies. Magnification: x6000 at 6x7cm, x3000 at 35mm size.

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Keywords: anatomy, cells, false-coloured, human body, immune, lymphocyte, white blood cell

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