T cell
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T cells are an important part of the immune system and play a central role in the adaptive immune response. T cells can be distinguished from other lymphocytes by the presence of a T-cell receptor on
Scanning electron micrograph of a red blood cell (left), a platelet (center), and a T lymphocyte (right); colorized
HIV-infected T cell
Depiction of the various key subsets of CD4-positive T cells with corresponding associated cytokines and transcription factors.
Thymus
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The thymus is a specialized primary lymphoid organ of the immune system. Within the thymus, T cells mature. T cells are critical to the adaptive immune system, where the body adapts to specific foreig
T cell
…receptor (TCR) on their cell surface. T cells are born from hematopoietic stem cells, found in the bone marrow. Developing T cells then migrate to the thymus gland to develop (or mature). T cells derive their name from the thymus. After migration to the thymus, getting stimulated by thymosin, the precursor…
Position of the human thymus
Micrograph showing a lobule of the thymus. The cortex (deeper purple area) surrounds a less dense and lighter medulla.
Micrograph showing a Hassall's corpuscle, found within the medulla of the thymus.
Thymus of a fetus