The thymus
is a specialized organ of
the immune system.
The thymus "educates"
T-lymphocytes (T cells),
which are critical cells
of the adaptive immune system.
Each T cell
attacks a foreign substance
which it identifies
with its receptor.
Each T cell attacks
a different antigen.
T cells that attack
the body's own proteins
are eliminated
in the thymus.
.The thymus
is composed of
two identical lobes
and is located anatomically in the
anterior superior mediastinum,
in front of the heart
and behind
the sternum.
The thymus
can be divided into a
central medulla
and a peripheral cortex
which is surrounded by
an outer capsule.
The cortex and medulla
play different roles
in the development of T-cells.
The thymus provides
an inductive environment
for development of
T-lymphocytes
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