Which statement describes the function of the collectors?

• A. Transports lymph to lymph nodes and lymphatic trunks
• B. Filters lymph
• C. Produces lymph
• D. Absorbs interstitial fluid into capillaries

Answer: (A)

Collectors move lymph through the lymphatic system toward regional lymph nodes and onward to the lymphatic trunks, using one‑way valves and smooth muscle to push fluid forward. This transport function is what keeps lymph circulating toward the venous system. Filtering, lymph formation, and absorption of interstitial fluid into capillaries are carried out by other parts of the system: lymph nodes filter lymph as it passes through, lymph is formed when interstitial fluid enters lymphatic capillaries, and those tiny capillaries absorb interstitial fluid rather than the collectors. So the primary role of collectors is to carry lymph toward nodes and trunks for eventual return to circulation.