Which structures comprise the superficial lymphatic system?

• A. Lymph capillaries and lymph trunks
• B. Precollectors, lymph collectors, and venous angle
• C. Initial lymph capillaries, precollectors, and lymph collectors
• D. Precollectors and lymph trunks

Answer: (C)

The superficial lymphatic system is made up of three connected parts that handle fluid entering from the tissues: the initial lymphatic capillaries, which are tiny, blind-ended vessels in the dermis that absorb interstitial fluid; the precollectors, which are slightly larger transitional vessels that channel fluid from the capillaries toward collecting vessels; and the lymph collectors, which are the main superficial drainage channels with valves to maintain forward flow toward deeper lymphatic pathways or toward lymph nodes. The venous angle marks where lymph re-enters the bloodstream, not a structural component of the superficial network, and lymph trunks are larger vessels typically associated with deeper drainage rather than the superficial system. So the best description of the superficial structures includes initial lymph capillaries, precollectors, and lymph collectors.