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).
Functions of the lymphatic system include (3): 1  Drainage of fluid from blood stream into the tissues â The circulating blood through narrow vessels leads to leakage of fluid or plasma into the tissues carrying oxygen and nutrients to the tissues and carrying waste materials from the tissues into the lymph channels.he cancer cells may also get trapped similarly at the lymph nodes and thus lymph nodes act as indicators of how far the cancer has already spread. 1  Filtering blood â This is done by the spleen. 2  The spleen filters out bacteria, viruses and other foreign particles.