Thymus Essentials. 1  The thymus gland, located behind your sternum and between your lungs, is only active until puberty. 2  After puberty, the thymus starts to slowly shrink and become replaced by fat. 3  Thymosin is the hormone of the thymus, and it stimulates the development of disease-fighting T cells.
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Southwest Airlines Rapid Rewards Credit Card. These features, including an expanded. selection of Cards, will be available beginning on March 1, 2011. âWe are very excited about the launch of the All-New Rapid Rewards and how it enables us to.