Which of the following glands has both lymphatic and endocrine functions?

• A. Thyroid
• B. Pineal gland
• C. Thymus
• D. Adrenal gland

Answer: (C)

Verified step by step guidance

1. Step 1: Begin by understanding the dual functions of the gland in question. A gland with both lymphatic and endocrine functions contributes to the immune system (lymphatic) and secretes hormones (endocrine).
2. Step 2: Review the functions of the thyroid gland. The thyroid is an endocrine gland that primarily regulates metabolism through hormone secretion, but it does not have lymphatic functions.
3. Step 3: Examine the pineal gland. The pineal gland is an endocrine gland responsible for producing melatonin, which regulates sleep-wake cycles. It does not have lymphatic functions.
4. Step 4: Investigate the thymus gland. The thymus is unique because it plays a role in the lymphatic system by producing T-cells for immune response and also has endocrine functions by secreting hormones like thymosin, which influence T-cell development.
5. Step 5: Consider the adrenal glands. The adrenal glands are purely endocrine glands that produce hormones such as cortisol and adrenaline, but they do not have lymphatic functions. Therefore, the thymus is the correct answer.