Medulla of thymus. Light micrograph of a section through the medulla of a healthy thymus. The thymus is a gland at the base of the neck that is involved in immune system development. At upper left is a Hassal's corpuscle (purple oval), an obscure cyst-like structure that may be a degenerated epithelial cell. At bottom centre are blood vessels. Within the tissue of the medulla are maturing T-lymphocytes (dark red), a type of immune cell. They migrate into the medulla from the thymus's outer cortex, before re-entering general circulation. Magnification unknown.
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Creative#:
TOP10218616
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達志影像
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RM
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