What is the purpose of lymph fluid?

• A. Carries waste/toxins out of the body, filtered by lymph nodes before re-entering circulatory system
• B. Transports oxygen in the blood
• C. Produces hormones
• D. Aids in digestion

Answer: (A)

Lymph fluid is the interstitial fluid that drains from tissues into lymphatic vessels and then passes through lymph nodes for filtering before returning to the bloodstream. Its main job is to carry waste and foreign material out of tissues and have it cleaned by lymph nodes, where macrophages and lymphocytes remove pathogens and debris. After filtration, the cleaned fluid re-enters the circulatory system, helping maintain fluid balance and support immune defense. This is why its purpose aligns with removing waste/toxins and routing them through a checkpoint before rejoining the blood. It does not carry oxygen in the blood, produce hormones, or aid digestion in its primary role.