Review of x-ray films of the chest failed to demonstrate the presence of a thymus-gland shadow at any time. S.F., an 11-day-old female infant, weighed 3402 gm (7 pounds, 8 ounces) at birth after a ...
The thymus gland helps the development of T-cells, which fight foreign substances in the body. It teaches these immune cells what is "self" and what isn't, and therefore what can be attacked.