Gross anatomy of Thymus - Location and Relations


dymas the thymus is a by lobed lymphoid

organ situated in the superior

mediastinum and often extends above in

the root of the neck and below in the

upper part of the anterior mediastinum

it is usually prominent in children and

gradually increases in size till puberty

when it weighs about 40 grams thereafter

it atrophies and gets infiltrated by

fibers and fatty tissue it is related

anteriorly to sternohyoid and

sternothyroid muscles and sternum and

posteriorly to the pericardium arch of

iota and its branches left

brachiocephalic vein and trachea it

secretes a hormone called thymosin which

plays an important role in the

development of immunity of the body