What happens in lymphoid organs with respect to immunity?

Explanation

### Step-by-Step Text Solution:

1. **Understanding Lymphoid Organs**: Lymphoid organs are specialized structures in the body that play a crucial role in the immune system. They are categorized into two main types: primary lymphoid organs and secondary lymphoid organs.

2. **Primary Lymphoid Organs**: The primary lymphoid organs include the bone marrow and the thymus.
- **Bone Marrow**: This is where all blood cells, including lymphocytes, are produced. Immature lymphocytes are generated here.
- **Thymus**: This organ is responsible for the maturation of T-lymphocytes (T-cells). Immature lymphocytes migrate from the bone marrow to the thymus, where they undergo differentiation and maturation to become antigen-sensitive lymphocytes.

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