U5: THE LYMPHATIC SYSTEM|UPDATED&VERIFIED|100% SOLVED|GUARANTEED SUCCESS

Lymphatic vessels large vessels with valves, which collect and carry lymph to lymph nodes Lymph the protein containing fluid that moves through lymphatic vessels Lymph nodes Small organs that act as check points to filter the lymph as it moves through the body Lymphatic trunk Where lymphatic vessels unite and drain large areas of the body Lacteals specialized lymph vessels in the small intestine that absorb fat into the bloodstream T cells Directly attack invading substances and manage the immune system B cells Secrets antibodies into the blood MALT set of lymphoid tissues located in mucous membranes throughout the body Describe the major function of the lymphatic system and how is it functionally related to the cardiovascular and immune systems. Return fluids that have leaked from the vascular system back to the blood. Related to cardiovascular because lymphatic vessels are intertwined throughout the capillary beds and they send lymph to heart, maintaining blood volume. Related to the immune system because the lymphoid organ, the thymus is where T cells mature so that they can defend against pathogens. Describe the source of lymph and summarize how it is transported through the body, including where it ends up. Lymph comes from interstitial fluids from where capillaries and body tissues exchange fluid were taken into lymphatic vessels, and is transported through lymphatic capillaries and ducts where it ends in the heart. Differentiate between blood capillaries and lymphatic capillaries. Blood caps transport oxygen and nutrients through blood, lymphatic caps transport lymph fluid to be filtered. Distinguish between the two lymphatic ducts in the body. Right lymphatic ducts take lymph from right upper limb, right side heart and thorax to the heart via the internal jugular vein. Thoracic ducts takes lymph from everywhere else to the heart via the subclavian vein. List the additional substances carried by the lymph to the heart through the lymphatic vessels. Leaked proteins, pathogens, and cancer cells, absorbed fat. List and define the three types of cells that make up lymphoid tissues and organs. Lymphocytes are main warriors of the immune (T cells and B cells), macrophages eat foreign substances and activate T cells and produces a fiber called stroma that creates a network to support the other cells in lymphoid organ and tissues Explain the different functional roles of primary and secondary lymphoid organs and list each structure included within each group. The primary lymphoid organs are the bone marrow and the thymus, that act as the production site, selection and maturation of b and T cells. The secondary lymphoid organs are the spleen and the lymph nodes, which act as sites for maintaining the mature naive lymphocytes and are also where the binging to antigen and their activation occurs. Defend the claim that the lymph nodes are the most critical structures in the lymphatic system. They are because the lymph nodes are the only one that cleanses the lymph.