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).
But where the circulatory system moves blood around the body, the lymphatic system moves a clear liquid known as lymph throughout the body. Lymph is full of white blood cells, also known as lymphocytes, which are the bodyâs main tools in the immune response.erving as one of the bodyâs main vessels of immunity, the lymphatic's primary function is to create immune cells. The system also helps to shuttle away fluids from tissue in the body, as well as absorb fat and move that fat to the circulatory system.