What is the primary role of the lymphatic system?

The primary role of the lymphatic system is to maintain fluid balance and protect against infection. This system plays a crucial role in returning excess interstitial fluid to the bloodstream, which helps to prevent edema, or swelling, that can occur when fluid accumulates in tissues. Additionally, the lymphatic system is a key component of the immune system. It facilitates the production and transport of lymphocytes, a type of white blood cell that is essential for fighting infections. The lymphatic vessels transport lymph, a clear fluid containing immune cells, throughout the body, ensuring that pathogens can be effectively identified and dealt with, enhancing the body’s ability to respond to infections.

The other options, while important functions of different body systems, do not pertain to the lymphatic system. Blood pressure regulation is primarily the function of the cardiovascular system. The absorption of oxygen occurs in the respiratory system, and the digestion of food is managed by the gastrointestinal system.