Thymus is .....A..... at the time puberty but it.....B..... with age. Here A and B refers to

Options

A. A-large, B-reducing
B. A-small, B-increasing
C. A-large, B-disappear
D. A-not present, B-appears

Answer

To answer the question, we need to fill in the blanks A and B regarding the thymus gland's size and its changes over time.

1. **Understanding the Thymus Gland**:
- The thymus is a primary lymphoid organ located in the neck region.
- It plays a crucial role in the immune system, particularly in the development and maturation of T lymphocytes (T cells).

2. **Thymus Size at Puberty**:
- At the time of puberty, the thymus gland is relatively large. This is when it is most active in producing T cells, which are essential for the immune response.

3. **Thymus Size with Age**:
- As a person ages, the thymus gland undergoes changes. The active lymphoid cells in the thymus are gradually replaced by fat cells.
- Consequently, the size of the thymus decreases with age, and its activity diminishes, leading to a weaker immune response in older adults.

4. **Filling in the Blanks**:
- For blank A: "Thymus is **large** at the time of puberty."
- For blank B: "but it **reduces** with age."

Thus, the complete statement is: "Thymus is **large** at the time of puberty but it **reduces** with age."