To which system does the lymphatic system ultimately empty?

The lymphatic system ultimately empties into the circulatory system, specifically through the subclavian veins where lymph is returned to the bloodstream. This connection is crucial because the lymphatic system plays an essential role in maintaining fluid balance in the body's tissues by collecting excess interstitial fluid, which is then transported as lymph.

Additionally, the lymphatic system is involved in transporting immune cells and waste products back to the circulatory system, facilitating immune responses and the removal of toxins. This integration ensures that the body's immune, circulatory, and fluid balance mechanisms work efficiently together, highlighting the importance of the lymphatic system in overall health and homeostasis.

The other systems mentioned do not serve as endpoints for the lymphatic system, as they do not have a direct role in managing lymph fluid or the components carried by lymph.