Lymph Nodes

Structure of the lymph node. Note that the afferent/efferent arrows should be pointed in the opposite direction.1. Efferent lymphatic vessel 2. Sinus 3. Nodule 4. Capsule 5. Medulla 6. Valve to prevent backflow 7. Afferent lymphatic vessel. Lymph nodes are components of the lymphatic system. They are sometimes incorrectly called "Lymph glands", but they do not secrete anything and are therefore not glands. Lymph nodes act as filters, with an internal honeycomb of connective tissue fill ...