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What is the lymphatic system?
The lymphatic system consists of lymph nodes and lymph vessels, which carry the lymph to the thoracic duct. Lymph is a colorless clear fluid, alkaline in nature that is produced in spaces between tissues. It contains cell debris, live or dead bacteria and viruses, white blood cells that fight infections, and occasionally, may also contain cancer cells from tumors. The lymph flows to the lymph nodes where the bacteria and viruses are destroyed. It is then carried back to the heart through veins in which the vessels of the lymphatic system empty the lymph. The flow of lymph is chiefly regulated by the pressure of the adjacent muscles. Any damage to the lymphatic vessels, adjoining muscles, or draining veins can lead to accumulation of lymph and swelling.
What is the role of the lymph?
The lymph is a protein-rich fluid that literally envelopes the tissues. It is said about lymph that just as water keeps a sponge moist by filling in the empty spaces within it; lymph fills in the spaces between tissues. It helps in defense against infections as it is rich is white blood cells called lymphocytes and macrophages which form the first line of defense in our body. It helps maintain the delicate fluid balance as well as maintain fluid pressure within the body.
