An official definition of indigenous has not been adopted by the UN system due to the diversity of the worldâs indigenous peoples. Instead, a modern and inclusive understanding of indigenous has been developed and includes peoples who:
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.nce mature, these cells leave the thymus and are transported via blood vessels to the lymph nodes and spleen. T lymphocytes are responsible for cell mediated immunity, which is an immune response that involves the activation of certain immune cells to fight infection.
The thymus gland is a flask-shaped organ lying in the lower neck and upper part of the mediastinum (superior mediastinum) in the chest cavity. It is an important part of the immune system in that it plays a major role in cell-mediated immunity.he thymus gland is most active in early life and this is reflected in its weight â 20 to 30 grams at birth, 30 to 50 grams up until puberty and 5 to 15 grams in old age. Its size at birth is approximately 50 millimeters in length and 40 millimeters in width with a variable thickness of about 6 millimeters.