where is the thymus located in your body
Thymus
In children , the thymus is pinkish - gray , soft , and lobulated on its surfaces . At birth it is about 4 -- 6 cm long , 2.5 -- 5 cm wide , and about 1 cm thick . It is made up of two lobes that meet in upper midline , that stretch from below the thyroid in the neck to as low as the cartilage of the fourth rib . It lies beneath the sternum , rests on the pericardium , and is separated from the aortic arch and great vessels by a layer of fascia . The left brachiocephalic vein may even be embedded within the thymus . In the neck , it lies on the front and sides of the trachea , behind the sternohyoidei and sternothyreoidei . 
In children , the thymus is pinkish - gray , soft , and lobulated on its surfaces . At birth it is about 4 -- 6 cm long , 2.5 -- 5 cm wide , and about 1 cm thick . It is made up of two lobes that meet in upper midline , that stretch from below the thyroid in the neck to as low as the cartilage of the fourth rib . It lies beneath the sternum , rests on the pericardium , and is separated from the aortic arch and great vessels by a layer of fascia . The left brachiocephalic vein may even be embedded within the thymus . In the neck , it lies on the front and sides of the trachea , behind the sternohyoidei and sternothyreoidei .
Thymus lies beneath the sternum , rests on the pericardium , and is separated from the aortic arch and great vessels by a layer of fascia . In the neck , it lies on the front and sides of the trachea , behind the sternohyoidei and sternothyreoidei .
It lies beneath the sternum , rests on the pericardium , and is separated from the aortic arch and great vessels by a layer of fascia . In the neck , it lies on the front and sides of the trachea , behind the sternohyoidei and sternothyreoidei .