lymphoid follicles

Lymphoid follicles are small, specialized structures within lymph nodes and other lymphatic tissues that play a key role in the immune system. They are composed mainly of B cells, a type of white blood cell, organized into a dense, rounded cluster. These follicles are sites where B cells become activated and multiply in response to infections or foreign substances. Some follicles develop a lighter center called the germinal center, where B cells rapidly divide and mature. Overall, lymphoid follicles are essential for detecting pathogens and generating targeted immune responses to protect the body.