How does the lymphatic system help maintain fluid balance in the body?

The lymphatic system plays a crucial role in maintaining fluid balance in the body primarily through the function of collecting excess interstitial fluid from tissues. This fluid, which accumulates between cells due to various factors, is absorbed by lymphatic vessels. Once collected, the fluid, now called lymph, is eventually returned to the bloodstream. This process helps prevent edema, which is the swelling that can occur when fluid is retained in tissues.

By effectively managing the excess fluid that accumulates in tissues, the lymphatic system helps ensure that the body's internal environment remains stable. This is crucial for various physiological processes, including nutrient transport and waste removal.

Additionally, the lymphatic system also plays a role in immune function by transporting lymphocytes and filtering out pathogens. However, its primary function relevant to fluid balance lies in its ability to absorb and return excess fluid to circulation. The other choices do not accurately describe the function of the lymphatic system in maintaining fluid balance.