Colour SEM of immune cells: dendritic and T-cells

Colour SEM of immune cells: dendritic and T-cells

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Credit: DAVID SCHARF/SCIENCE PHOTO LIBRARY

Caption: Dendritic and T-cells. Coloured Scanning Electron Micrograph (SEM) of two types of protective cell of the human immune system. A long dendritic or Langerhans cell is seen at lower left stretching to top right. Dendritic cells are phagocytic cells which are found in the epidermis. The cell recognises foreign proteins (antigens) and ingests them into Birbeck granules in its cytoplasm, "processing" the antigen and then secreting it to be dealt with by other immune cells. At top right is a rounded T-cell, a lymphocyte white blood cell which actively seeks out and destroys micro- organisms like viruses. Some T-cells are known as killer T-cells. Magnification: x800 at 6x7cm size. x1400 at 4x5 inch size.

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Keywords: anatomy, dendritic, dendritic cell, human body, immune system, immunology, langerhans cell, t-cell, t-cell and dendri, t-lymphocyte, white blood cell

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