In which direction does lymphatic fluid move?

The movement of lymphatic fluid primarily occurs toward the heart. The lymphatic system is designed to collect excess interstitial fluid that seeps out of blood vessels into tissues, and it channels this fluid, known as lymph, through a network of lymphatic vessels. These vessels have one-way valves that prevent backflow, ensuring that the lymph continues to flow in one direction toward larger lymphatic ducts and eventually into the bloodstream at the junction of the subclavian and internal jugular veins.

While the lymphatic fluid does move away from tissues initially, its ultimate destination is the heart. This process is essential for maintaining fluid balance, transporting immune cells, and facilitating the absorption of fats and fat-soluble vitamins from the digestive system.