ANATOMY

Detailed explanation-1: -The thymus is a primary lymphoid organ responsible for the production of immunocompetent T cells and, with aging, it atrophies and declines in functions.

Detailed explanation-2: -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 pituitary gland is located just below (anterior pituitary) or in (posterior pituitary) the brain. This gland reaches its maximum size in middle age and then gradually becomes smaller.

Detailed explanation-4: -A critical immune organ called the thymus shrinks rapidly with age, putting older individuals at greater risk for life-threatening infections. A study published August 6 in Cell Reports reveals that thymus atrophy may stem from a decline in its ability to protect against DNA damage from free radicals.

Detailed explanation-5: -Anatomy of the thymus gland. 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.