The thymus is a specialized primary lymphoid organ of the immune system. Within the thymus, T cells or T lymphocytes mature. T cells are critical to the adaptive immune system, where the body adapts specifically to foreign invaders. The thymus is composed of two identical lobes and is located anatomically in the anterior superior mediastinum, in front of the heart and behind the sternum.
https://en.wikipedia.org/wiki/Thymus
The importance of the thymus in the immune system was discovered in 1961 by Jacques Miller, by surgically removing the thymus from one day old mice, and observing the subsequent deficiency in a lymphocyte population, subsequently named T-cells after the organ of their origin.
https://en.wikipedia.org/wiki/Thymus
1 The thymus differs from other lymphoid organs in important ways. 2  It functions strictly in T lymphocyte maturation. 3  It does not directly fight antigens. 4  The stroma of the thymus consists of star-shaped epithelial cells which secrete the hormones that stimulatelymphocytes to become immunocompetent.
http://apchute.com/ap2chap/chapt20.htm
1 Lymph nodes are the principal lymphoid organs of the body. 2  Nodes are imbedded in connective tissue and clustered along lymphatic vessels. 3  Aggregations of these nodes occur near the body surface in inguinal, axillary, and cervical regions of the body.
http://apchute.com/ap2chap/chapt20.htm
Thymus. The thymus gland is the main organ of the lymphatic system. Located in the upper chest region, the primary function of this gland is to promote the development of specific cells of the immune system called T lymphocytes.
http://biology.about.com/od/anatomy/ss/thymus.htm
The thymus produces hormone-like proteins that help T lymphocytes mature and differentiate. Some thymic hormones include thympoeitin, thymulin, thymosin, and thymic humoral factor (THF). Thympoeitin and thymulin induce differentiation in T-lymphocytes and enhance T-cell function.
http://biology.about.com/od/anatomy/ss/thymus.htm
1 Lymphocytes are the main cells involved in the immune response. 2  The two main varieties are T cells and B cells. 3  T cells and B cells protect the body against antigens (anything the body perceives as foreign). 4  Bacteria and their toxins; viruses.
http://apchute.com/ap2chap/chapt20.htm
1 Beginnings of the lymphatic vessels and main clusters of lymph nodes are apparent by the fifth week of embryonic development. 2  These arise from the budding of lymph sacs from developing veins. 3  Lymphatic organs (except the thymus) arise from mesoderm.
http://apchute.com/ap2chap/chapt20.htm
Lymph Nodes. 1  Lymph nodes are the principal lymphoid organs of the body. 2  Nodes are imbedded in connective tissue and clustered along lymphatic vessels. 3  Aggregations of these nodes occur near the body surface in inguinal, axillary, and cervical regions of the body.
http://apchute.com/ap2chap/chapt20.htm
The cortex and medulla play different roles in the development of T-cells. Cells in the thymus can be divided into thymic stromal cells and cells of hematopoietic origin (derived from bone marrow resident hematopoietic stem cells). Developing T-cells are referred to as thymocytes and are of hematopoietic origin.
https://en.wikipedia.org/wiki/Thymus
what hormones contain t lymphocyte
T lymphocyte is contained by Thymus. Thymus is a hormone that contain T lymphocyte.