and an inner medulla.If antigens enter the body via the respiratory or gastrointestinal tracts,they must pass through the lymph nodes. B cells and plasma cells are accumulated in subcapsular follicles,while T cells occupy space between them in the diffuse cortex. Return This page is maintained by the Natural Toxins Research Center at Texas A&M University -Kingsville. and an inner medulla. If antigens enter the body via the respiratory or gastrointestinal tracts, they must pass through the lymph nodes. B cells and plasma cells are accumulated in subcapsular follicles, while T cells occupy space between them in the diffuse cortex. Return This page is maintained by the Natural Toxins Research Center at Texas A&M University - Kingsville