What is the main function of the lymphatic system?
a. maintaining fluid balance
b. fighting infection
c. cleaning the blood
d. making lymph

The lymphatic system has multiple interrelated functions. It is responsible for the removal of interstitial fluid from tissues. It absorbs and transports fatty acids and fats as chyle from the digestive system. It transports white blood cells to and from the lymph nodes into the bones. So the answer is "B".