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thymus gland
- A gland located behind the breastbone that functions in the development of the immune system . The thymus is large in infancy and early childhood but begins to atrophy between ages eight and ten.
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Example Sentences
The thymus gland attains a considerable development in the embryo and shrinks away to the merest vestige in the adult.
It is nearly always accompanied by a distinct hypertrophy of the thymus gland.
The thymus gland, which lies near the heart and is often called the heart sweetbread, is the best one.
Of the four basic components on the right, thymine occurs in the nucleic acid from the thymus gland.
After respiration they expand and occupy the whole thorax, and closely surround the heart and thymus gland.
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