 There are no lymph nodes in the central nervous system, which is separated from the body by the blood-brain barrier.Lymph from the meningeal lymphatic vessels in the CNS drains to the deep cervical lymph nodes.A lymph node is divided into compartments called "nodules" (or lobules), each consisting of a region of cortex with combined follicle B cells, a paracortex of T cells, and a part of the nodule in the medulla.