Login to your BIOSCIENCE. account and enjoy increased access to BIOSCIENCE. content, ideas and unlock downloads. A selection of top articles hand-picked by our editors available only to registered users.
Educational and corporate subscriptions give institutions and students unlimited access to the BIOSCIENCE. Archive, an essential tool for health-science and biology education and research.
Organ located behind the upper breastbone at the base of the neck that is part of the lymphatic and immune systems; disease-fighting white blood cells called T-cells develop and mature in the thymus before entering circulation. In humans, the thymus is normally active in childhood but becomes less active after puberty, eventually losing most immune activity by adulthood.