Where are efferent vessels found in relation to a lymph node?

Where are efferent vessels found in relation to a lymph node?

• A. At the hilum
• B. Located in the outer cortex
• C. Inside the medulla
• D. Around the capsule

Answer: (A)

Efferent vessels are responsible for transporting lymph away from lymph nodes after it has been filtered. They are found at the hilum of the lymph node, which is the point of exit for lymphatic fluid. The hilum provides a passage for the efferent lymphatic vessels to connect the node to other parts of the lymphatic system, facilitating the continuation of lymph flow after it has been processed and filtered within the lymph node.

The structure of the lymph node allows incoming lymph to enter through afferent vessels and be processed by the node's immune cells, primarily located in the cortex and medulla. Afterward, the filtered lymph exits through the efferent vessel at the hilum, demonstrating the important directionality of lymphatic transport. Understanding this relationship helps clarify the functional architecture of the lymphatic system and the role lymph nodes play in immune surveillance and fluid balance.