Primary lymphoid tissue

Definition

Primary lymphoid tissue includes the bone marrow and thymus, where lymphocytes (B cells and T cells) are produced and mature. These tissues are crucial for the development of the adaptive immune system.

5 Must Know Facts For Your Next Test

1. Primary lymphoid tissues are essential for the maturation of B cells and T cells.
2. Bone marrow is responsible for producing all blood cells, including lymphocytes.
3. The thymus is where T cells mature and undergo selection to ensure they can recognize pathogens but not attack the body's own tissues.
4. Primary lymphoid tissues are distinct from secondary lymphoid tissues, which include lymph nodes and spleens where immune responses are activated.
5. Proper functioning of primary lymphoid tissues is critical for a robust adaptive immune response.

Review Questions

Related terms

Secondary Lymphoid Tissue: Sites such as lymph nodes and spleen where immune responses are initiated.

Lymphocyte: A type of white blood cell that plays a significant role in the adaptive immune system.

Adaptive Immune System: Part of the immune system that adapts to new threats, involving B cells and T cells.