Identification and Histological Structure of Lymphoid Tissues

Anatomical and Histological Features of Lymph Nodes

Lymph nodes are small, encapsulated organs vital to immune function. They act as filtration centers for lymph fluid and play a crucial role in identifying pathogens and mounting immune responses.

Structure of Lymph Nodes

• Cortex: Contains B-cell-rich lymphoid follicles essential for antibody production.
• Paracortex: T-cell zone responsible for antigen recognition and immune activation.
• Medulla: Houses macrophages and plasma cells, aiding in pathogen elimination.

Histological Characteristics

The lymph node structure supports immune surveillance. The reticular fiber network and specialized endothelial cells facilitate immune cell movement and interaction.

Other Lymphoid Organs

Spleen

Filters blood, recycles red blood cells, and assists in immune responses.

Thymus

Essential for T-cell maturation during early life stages.

Tonsils

Trap and eliminate pathogens entering via the oral and nasal cavities.