ANATOMY

Detailed explanation-1: -THE THYMUS IS A SPECIALIZED ORGAN THAT DIRECTS THE DEVELOPMENT AND SELECTION OF T CELLS WHICH DIRECT ADAPTIVE IMMUNITY. THYMIC FUNCTION IS SPATIALLY AND TEMPORALLY REGULATED AND WANES WITH AGE. THYMIC OUTPUT IS ESSENTIAL DURING EARLY LIFE TO ESTABLISH IMMUNE COMPETENCE AND HOMEOSTASIS BUT IS DISPENSABLE THEREAFTER.

Detailed explanation-2: -The thymus is special in that, unlike most organs, it is at its largest in children. Once you reach puberty, the thymus starts to slowly shrink and become replaced by fat. By age 75, the thymus is little more than fatty tissue. Fortunately, the thymus produces all of your T cells by the time you reach puberty.

Detailed explanation-3: -The thymus gland is a small organ that lies in the upper chest under the breastbone. It makes white blood cells, called lymphocytes, which protect the body against infections.