Part A - Lymph Node Structure and Function Using no more than 14 propositions, create a Concept Map to determine the structure and function of lymph nodes. Part B - Spleen Structure and Function Using no more than 14 propositions, create a Concept Map to determine the structure and function of the spleen. Concept Map: Lymphatic Circulation lymphatic capillaries contain (s) structures that prevent backflow, called valves conduct(s) lymph toward the skeletal muscle allow(s) for the movement of blood heart plasma and interstitial fluid into the blood capillaries include(s) the lacteals that transport a white, lymphatic vessels and fatty fluid called trunks transport (s) lymph due to the pumping action of the chyle Solution Blood capillaries allow(s) for the movement of blood plasma and interstitial fluid into the lymphatic vessels and trunks. Lymphatic capillaries contain structures that prevent backflow, called valves. Lymphatic capillaries conduct lymph towards the heart. They transport lymph due to the pumping action of the skeletal muscle. The lymphatic vessels and trunks include(s) the lacteals that transport a white, fatty fluid called chyle. Lymph nodes filter debris and foreign matter from the lymphatic fluid. A lymph node is surrounded by the fibrous capsule. Beneath the capsule, the node contains specific tissues called cortex and medulla. It contains fluid filled spaces called the sinuses. It also contains macrophages suspended on a network of reticular fibers. The lymph nodes are served by fluid- conducting vessels at the hilum called the afferent lymph vessels..