HERVE CONGE, ISM / SCIENCE PHOTO LIBRARY HERVE CONGE, ISM / SCIENCE PHOTO LIBRARY
Light micrograph of a section through a young thymus gland showing the detail of a thymic lobule with an outer cortex (pink) and inner medulla (at centre). The cortex largely contains developing T-lymphocytes, a type of immune white blood cell. The thymus is a gland in the lower part of the neck that is involved in the maturation of lymphocytes and thus it is an important part of the immune system. Magnification: x100 at 24x36mm size.
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