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Thymus gland, light micrograph

Thymus gland, light micrograph

C024/8117

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Credit

MICROSCAPE / SCIENCE PHOTO LIBRARY MICROSCAPE / SCIENCE PHOTO LIBRARY

Caption

Light microscopy of the thymus gland displaying a lobular morphology with an outer dense cortex and inner lighter stained medulla. Red structures are blood vessels. Seeded with precursor white blood cells from bone marrow the thymus selects a tiny fraction for development into T lymphocytes essential for normal immune functions. The cortex teems with huge numbers of differentiating lymphocytes. The medulla provides final maturation steps prior to release of competent T cells into the general body circulation. With advancing age the thymus shrinks considerably and is slowly replaced by fibrofatty tissue. Magnification x25 when printed at 10 cm.

Release details

Model release not required. Property release not required.

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