Which statement best describes the relationship between the superficial and deep lymphatic systems?

• A. They are completely separate with no connections
• B. They are connected and functionally integrated
• C. They have no role in lymph formation
• D. They only transport to the liver

Answer: (B)

The main idea is that the superficial and deep lymphatic networks form one connected, working system. The superficial vessels under the skin collect fluid from the skin and subcutaneous tissues and connect with deeper lymphatics through perforating vessels and other connections. From there, lymph moves into deeper collectors, passes through regional lymph nodes, and drains into the major trunks (like the thoracic duct or right lymphatic duct) before entering the venous system. Because these connections exist, the two networks aren’t isolated; they function together to maintain fluid balance and immune function. They aren’t separate, they do play a role in lymph formation, and they don’t primarily transport lymph to the liver—the main drainage ends in the venous system after passing through nodes, not directly to the liver.