👉 The third fluid, often referred to as the lymph fluid, plays a crucial role in the body's immune system and fluid balance. Unlike blood, which is circulated throughout the body by the heart, lymph fluid moves through a network of vessels called lymphatic vessels. This fluid collects excess fluid, proteins, and waste products from tissues and transports it back into the bloodstream via the lymphatic ducts. Lymph nodes, which are small, bean-shaped structures, filter lymph fluid to remove pathogens and debris, while also housing immune cells like lymphocytes that help fight infections. This fluid is essential for maintaining the body's homeostasis and defending against diseases.
