👉 The fourth fluid, often referred to as lymph, is a colorless, slightly yellowish fluid that circulates throughout the body, playing a crucial role in the immune system. Produced by tissues and organs as part of the process of breaking down fats, proteins, and nucleic acids, lymph travels through a network of vessels called lymphatic vessels. Unlike blood, which is part of the circulatory system and carries oxygenated blood, lymph does not have a direct connection to the heart. Instead, it flows into large lymphatic vessels and eventually drains into the bloodstream at the junction of the subclavian and internal jugular veins, where it becomes part of the venous system. This fluid helps remove waste products, toxins, and pathogens from tissues, aiding in maintaining overall health and fighting infections.
