What is the role of lymph in the circulatory system?

The role of lymph in the circulatory system primarily centers on maintaining fluid balance within the body. The lymphatic system is responsible for collecting excess interstitial fluid, which accumulates in tissues as a result of the filtration process from blood vessels. When fluid leaks out from blood capillaries, it can’t all return directly to the bloodstream. The lymphatic system then captures this excess fluid and returns it to the circulatory system, thereby preventing edema (swelling) and helping to maintain homeostasis.

By processing this excess fluid, lymphatics also help in transporting proteins and waste products from tissues back into the bloodstream, ensuring that bodily fluid levels remain stable and that tissues receive adequate nourishment without accumulating excess fluid. This balance is crucial for healthy cellular function and overall fluid homeostasis in the body.