Question

The lymphatic system serves to:

• A. Transport $O_2$ to the brain
• B. Transport $C{O}_2$ to the lungs
• C. Return the interstitial fluid to the blood
• D. Return the WBCs and the RBCs to the lymph nodes

Answer 1

The correct option is C Return the interstitial fluid to the blood

The lymphatic system returns excess interstitial fluid to the blood. Of the fluid that leaves the capillary, about 90 percent is returned. The 10 percent that does not return becomes part of the interstitial fluid that surrounds the tissue cells. Thus, the fluid volume in the interstitial compartment is kept constant.