Which gland atrophies in adults?

Options

A. Pancreas gland
B. Thymus gland
C. Adreanal gland
D. Thyroid gland

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which gland atrophies in adults. Atrophy refers to the reduction in size or wasting away of an organ or tissue.

2. **Identifying the Options**: The options provided are:
- Pancreas
- Thymus gland
- Adrenal gland
- Thyroid gland

3. **Analyzing Each Gland**:
- **Pancreas**: This gland does not atrophy in adults; it continues to function throughout life.
- **Adrenal Gland**: This gland also does not atrophy significantly in adults; it remains functional.
- **Thyroid Gland**: The thyroid gland may change in size but does not atrophy in the same manner as the thymus.
- **Thymus Gland**: This gland is prominent at birth and decreases in size as a person ages.

4. **Conclusion**: The thymus gland is the only gland listed that atrophies in adults. It starts out large in childhood, but as a person grows, it reduces in size and can become negligible in adulthood.

5. **Final Answer**: The gland that atrophies in adults is the **thymus gland**.

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