What is the major role of thymus gland ?

Explanation

**Step-by-Step Solution:**

1. **Definition of Thymus Gland**: The thymus gland is a lobular structure that is part of the lymphatic system. It is located in the chest, specifically between the lungs.

2. **Production of White Blood Cells**: The primary function of the thymus gland is to produce white blood cells, specifically T lymphocytes (T cells).

3. **Role of T Lymphocytes**: In the thymus gland, T lymphocytes grow and multiply. These cells are crucial components of the immune system.

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