According to About.com, the major functions of lymph nodes are to assist the body's immune system and to filter lymph. About.com explains that these masses of tissue and other lymphatic organs are essential in preventing the buildup of fluid in tissues, protecting the body against infections and regulating blood pressure and volume.Know More
About.com states that lymph nodes are found in each part of the body except for the central nervous system. The lymph filtered by these specialized tissues refers to the clear fluid that surrounds the cells. According to About.com, the lymph nodes have an important function of filtering the lymph of pathogens, such as bacteria and viruses, dead cells, wastes and cancerous cells. The lymph that is filtered is then returned to the blood to prevent edema or the excess fluid buildup in the tissues.
About.com also explains that lymph nodes contain lymphocytes, which are immune system cells that are responsible for identifying and battling pathogens. According to About.com, the B-cell lymphocytes contained in the lymph nodes activate when an antigen is present, and antibodies are produced to fight that particular antigen. Additionally, the T-cell lymphocytes also aid in the destruction of these harmful pathogens and promote cell-mediated immunity.Learn more in Human Anatomy
Lymph nodes are tiny structures that help the body filter harmful and unhealthy substances, especially those that lead to infection. Cancer.org explains that each lymph node is packed with immune cells that help the body fight off infections by attacking germs carried to the nodes through lymph fluid.Full Answer >
A mechanical barrier in the immune system is a primary line of defense, which physically impedes the entry of foreign particles that may harm the body. Common mechanical barriers include the skin, mucous membranes and the cornea.Full Answer >
Lymph is formed when interstitial fluid comes into contact with blood. Initially, it is a watery liquid with the same consistency as interstitial fluid, according to the Journal of Lipid Research. However, lymph thickens as it accumulates additional material from blood, such as proteins and lymphocytes.Full Answer >
According to the University of Illinois, the thoracic duct drains the lymph fluid into the right and left subclavian veins. It collects this lymph from the lower part of the body, including the legs and the organs of the digestive system.Full Answer >