Final answer:
Lymphoid tissue and lymph nodes are both involved in the immune system, but they have distinct characteristics. Lymphoid tissue refers to a type of tissue found in various parts of the body, including lymph nodes. Lymph nodes are specific organs that filter lymph and house B and T lymphocytes, as well as other immune cells.
Step-by-step explanation:
Lymphoid tissue and lymph nodes both play important roles in the immune system, but they have different characteristics. Lymphoid tissue refers to a type of tissue found in various parts of the body, including lymph nodes. It contains lymphocytes, which are specialized white blood cells involved in the immune response.
On the other hand, a lymph node is a specific organ that filters lymph and contains specialized areas called germinal centers where B and T lymphocytes are found. Lymph nodes also contain macrophages and dendritic cells for antigen presentation.