ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Thymus. Computer artwork of the butterfly shaped thymus endocrine gland which is located ahead of the heart, playing a role in the immune system and atrophies progressively after puberty. Shown here is the front side. The thymus is a specialized organ of the immune system. It instructs T-lymphocytes (T cells), which are critical cells of the adaptive immune system. Shown in green is also the surrounding system of lymphatic vessels and nodes.
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