Final answer:
Approximately 15% of the extracellular fluid is lost to the interstitial space, resulting in about 3 liters per day. The remaining fluid is reabsorbed back into the blood vessels. The lymphatic system helps drain the excess fluid and return it to the bloodstream.
Step-by-step explanation:
Approximately 15% of the extracellular fluid, specifically the interstitial fluid, is lost to the interstitial space. This amounts to around 3 liters per day. The remaining fluid is reabsorbed back into the blood vessels.
Once in the interstitial space, the fluid is referred to as interstitial fluid. The lymphatic system then drains the excess fluid and returns it to the bloodstream through a network of vessels, trunks, and ducts. When the lymphatic system is damaged, such as by injury or blockage, the fluid may accumulate in the tissues, leading to a condition called lymphedema.