Question

__________________ i am the vanishing gland. you need me most during your early childhood years and i begin to disappear when you reach puberty. i am considered a member of both the endocrine and the lymphatic system. i secrete a hormone, which helps to stimulate lymphoid cells to produce t-cells. you need me to help fight off diseases. who am i?

Answer 1

The answer is the thymus gland. 
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