The symptoms of flu usually develop within one to three days of becoming infected. Most people will feel better within a week. However, you may have a lingering cough and still feel very tired for a further couple of weeks. Flu can give you any of the following symptoms: a sudden fever â a temperature of 38C (100.4F) or above.
The lymphatic system has three functions: 1  The removal of excess fluids from body tissues. 2  This process is crucial because water, proteins, and other substances are continuously leaking out of tiny blood capillaries into the surrounding body tissues. Absorption of fatty acids and subsequent transport of fat, chyle, to the circulatory system. 2  Production of immune cells (such as lymphocytes, monocytes, and antibody producing cells called plasma cells).
The major components of the lymphatic system include lymph, lymphatic vessels, and lymphatic organs that contain lymphoid tissues. Lymphatic tissue can also be found in other areas of the body, such as the skin, stomach, and small intestines. Its primary function is to promote the development of specific cells of the immune system called T-lymphocytes. 2  Once mature, these cells leave the thymus and are transported via blood vessels to the lymph nodes and spleen.