Lymphatic system

This overview addresses lymphatic system with particular emphasis on the structure and function of the lymphatic system, including its roles in fluid balance and immunity. We will discuss key components such as lymphatic vessels, nodes, the spleen, and the thymus, outlining how they collaborate to filter lymph and support immune responses. The lecture will examine the production and actions of lymphocytes and explain how the lymphatic system interacts with the circulatory system. Lastly, we will explore common lymphatic disorders and the clinical significance of this system in health and disease. This system is vital for both immunity and fluid balance in the body. It consists of a network of lymphatic vessels that run alongside blood vessels and transport a clear fluid called lymph. Along these vessels are many lymph nodes, small organs that filter lymph. Other key structures include the spleen, which filters blood and supports immunity and the thymus, where T lymphocytes mature. Distributed lymphatic tissues provide surveillance and defense against pathogens. One principal role of the lymphatic system is maintaining fluid balance in the body. As blood circulates through capillaries, some plasma seeps out to bathe tissues. Lymphatic vessels collect this excess fluid now called lymph, preventing tissue swelling by returning it to the bloodstream at the base of the neck. Lymph passes through lymph nodes that filter debris and pathogens. Movement of lymph relies on muscle activity,