What are the primary components of a lymph node's structure?

The primary components of a lymph node's structure include the outer cortex, inner medulla, and a fibrous capsule. The fibrous capsule encases the entire lymph node, providing structural support and protection. The outer cortex contains follicles with B lymphocytes and is the site where immune responses are initiated, while the inner medulla is composed of medullary cords and sinuses containing T lymphocytes and other immune cells. This organized structure facilitates the filtration of lymph fluid, enabling the lymph nodes to effectively screen for pathogens and initiate immune responses.