Search Results       Your search for [subject]Thymus glands returned 1 record.           The thymus gland : researchers believe that the reason the thymus gland begins to shrivel up at about 7 or so is simply because it has done its job and is no longer needed. T-cells are able to reproduce on their own once they have left the thymus. Subject: Glands; Thymus glands.          Add to Book Cart Relevance: 21.48%