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Pineal Gland and Thymus

Description
The pineal gland is attached to the roof of the third ventricle of the brain and secretes melatonin which helps to regulate the body’s biological clock.
The thymus is located behind the sternum between the lungs. It produces thymosin, thymic humoral factor (THF), thymic factor (TF) and thymopoietin, all of which promote maturation of the immune system’s T cells.
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