(Tıp) Ön mediyastende bulunan bir bez olup, püberteye kadar yaptığı hormonla kemiklerin ve jenital bezlerin gelişmesine ve sinir çalışmalarına tesir eder ve sonra küçülür,timus
- a bilobed organ situated in the anterior mediastinum, which is the site of maturation of T lympchocytes from bone marrow-derived precursors Thymic tissue is divided into an outer cortex and an inner medulla and contains stromal thymic epithelial cells, macrophages, dendritic cells, and numerous T cell precursors at various stages of maturation
a lymphoid organ located in the chest behind the sternum The thymus is a source of T-lymphocytes in children, but generally shrinks during adolescence The thymus is the site of T-lymphocyte differentiation, where the cells learn to recognize antigens The thymus produces some 30 hormones or thymic factors (e g , thymodulin, thymopentin, thymostimulin) that are involved in the regulation of immune function
a lymphoid organ in the chest that is the site of lymphocyte formation and maturation as well as the secretion of thymic hormones An important function of the thymus is to weed out lymphocytes that react to proteins produced by the body ("self-antigens"), thus preventing autoimmune disease The thymus is a large organ during childhood, but shrinks during adolescence
a glandular structure of largely lymphoid tissue that functions in the development of the body's immune system, located in the upper chest or at the base of the neck
Pyramid-shaped lymphoid organ (see lymphoid tissue) between the breastbone and the heart. Starting at puberty, it shrinks slowly. It has no lymphatic vessels draining into it and does not filter lymph; instead, stem cells in its outer cortex develop into different kinds of T cells (see lymphocytes). Some migrate to the inner medulla and enter the bloodstream; those that do not may be destroyed to prevent autoimmune reactions. This process is most active during infancy. If a newborn's thymus is removed, not enough T cells are produced, the spleen and lymph nodes have little tissue, and the immune system fails, causing a gradual, fatal wasting disease. Thymus removal in adults has little effect
A ductless gland, consisting mainly of lymphatic tissue, located behind the top of the breastbone. It is most active during puberty, after which it shrinks in size. It plays an important role in the development of the immune system and produces lymphocytes
a lymphoid organ in the upper chest cavity The thymus is the site of T-cell differentiation, where the cells learn to recognize antigens The thymus produces some 30 hormones or thymic factors (e g , thymodulin, thymopentin) that are involved in the regulation of immune function
A lymphoid organ in the upper chest The thymus is essential in programming T-cells for normal functioning HIV damages the thymus causing it to shrink and malfunction This results in the loss