T cell


T cell
Immunol.
any of several closely related lymphocytes, developed in the thymus, that circulate in the blood and lymph and orchestrate the immune system's response to infected or malignant cells, either by lymphokine secretions or by direct contact: helper T cells recognize foreign antigen on the surfaces of other cells, then they stimulate B cells to produce antibody and signal killer T cells to destroy the antigen-displaying cells; subsequently suppressor T cells return the immune system to normal by inactivating the B cells and killer T cells. Also called T lymphocyte.
[1965-70; T(hymus-derived)]

* * *

With the B cell, one of the two main types of white blood cell, essential parts of the immune system.

T cells originate in the bone marrow, mature in the thymus, and travel in the blood to other lymphoid tissues, such as the spleen, tonsils, and lymph nodes. Through receptor molecules on their surfaces, T cells directly attack invaders (antigens) by binding to them and helping remove them from the body. Because the body contains millions of T and B cells, many of which carry unique receptors, it can respond to virtually any antigen. See also antibody, immunology.

* * *


Universalium. 2010.

Look at other dictionaries:

  • Cell (microprocessor) — Cell is a microprocessor architecture jointly developed by Sony Computer Entertainment, Toshiba, and IBM, an alliance known as STI . The architectural design and first implementation were carried out at the STI Design Center in Austin, Texas over …   Wikipedia

  • Cell culture — in a Petri dish Epithelial cells in culture, stained for keratin (red) an …   Wikipedia

  • Cell — Saltar a navegación, búsqueda Para el personaje de Dragon Ball Z, véase Cell (Dragon Ball). El procesador Cell Cell es una arquitectura de microprocesador desarrollada conjuntamente por Sony Computer Entertainment …   Wikipedia Español

  • Cell signaling — is part of a complex system of communication that governs basic cellular activities and coordinates cell actions. [Witzany, G. (2000). Life: The Communicative Structure. Norderstedt, Libri BoD.] The ability of cells to perceive and correctly… …   Wikipedia

  • Cell (Processeur) — Pour les articles homonymes, voir Cell. Le Cell est un processeur conçu conjointement par IBM, Sony et Toshiba, révélé en février 2005. Il équipe notamment la console de jeu vidéo PlayStation 3 de Sony. Il est envisagé de produire également… …   Wikipédia en Français

  • Cell Jr. — Cell (Dragon Ball) Pour les articles homonymes, voir Cell. Cell Personnage de Dragon Ball …   Wikipédia en Français

  • Cell (Dragon Ball) — Saltar a navegación, búsqueda Cell セル (Seru) Sexo Masculino Fecha de nacimiento Futuro alterno (787), Presente (763 767) Origen en manga …   Wikipedia Español

  • Cell site — Cell phone tower in Palatine, Illinois, USA. A short mast cell site o …   Wikipedia

  • Cell disruption — is a method or process for releasing biological molecules from inside a cell. Choice of disruption method The production of biologically interesting molecules using cloning and culturing methods allows the study and manufacture of relevant… …   Wikipedia

  • Cell migration — is a central process in the development and maintenance of multicellular organisms. Tissue formation during embryonic development, wound healing and immune responses all require the orchestrated movement of cells in a particular direction to a… …   Wikipedia

  • Cell theory — refers to the idea that cells are the basic unit of structure in every living thing. Development of this theory during the Mid 1600s was made possible by advances in microscopy. This theory is one of the foundations of biology. The theory says… …   Wikipedia


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.