Thymus

Definition

The thymus is a small, lobulated organ located in the upper anterior portion of the chest cavity, crucial for the development and maturation of T-lymphocytes (T cells), which are essential components of the adaptive immune system. It gradually shrinks after puberty, but its early-life function is critical for establishing a robust immune defense.

Related terms

T: Lymphocytes - White blood cells that play a central role in cell-mediated immunity, developed and matured within the thymus.

Immune System:

The body's defense mechanism against infectious organisms and other invaders, comprising various organs, cells, and proteins.

Endocrine System:

A collection of glands that produce hormones to regulate processes such as growth, metabolism, and sexual function; the thymus has secondary endocrine functions related to immune system development