HERVE CONGE, ISM / SCIENCE PHOTO LIBRARY HERVE CONGE, ISM / SCIENCE PHOTO LIBRARY
Light micrograph of a section through a lymph node showing medullary cords (dark pink) and lymphatic sinuses (white). The medullary cords contain B lymphocytes (a type of white blood cell) which are important in the immune response. A lymph node filters and destroys pathogens (disease cells and organisms) in the body. Magnification: x25 at 24x36mm size.
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