Lymph nodes are secondary lymphoid organs. Explain the role of lymph nodes in our immune response.

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Lymphoid Organs:**
- Lymphoid organs are crucial components of the immune system where lymphocytes, the cells responsible for immune responses, mature and proliferate. They are categorized into two types: primary and secondary lymphoid organs.

2. **Primary vs. Secondary Lymphoid Organs:**
- Primary lymphoid organs include the bone marrow and thymus, where B cells and T cells mature and develop antigen-specific receptors.
- Secondary lymphoid organs, such as lymph nodes, spleen, and tonsils, are where mature lymphocytes interact with antigens.
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