Which statement is true of lymph nodes?

• A. There is a dense collection located in the feet and hands.
• B. They contain red pulp.
• C. They have fewer efferent vessels than afferent vessels.
• D. They lack a capsule.
• E. There are over 10,000 located throughout the body.

Answer: (C)

Verified step by step guidance

1. Understand the structure and function of lymph nodes: Lymph nodes are small, bean-shaped structures that are part of the lymphatic system. They filter lymph fluid and contain immune cells that help fight infection.
2. Identify the key features of lymph nodes: Lymph nodes have a capsule, which is a fibrous covering that encloses the node. They contain both afferent vessels, which bring lymph fluid into the node, and efferent vessels, which carry filtered lymph fluid away.
3. Compare the number of afferent and efferent vessels: Lymph nodes typically have more afferent vessels than efferent vessels. This design allows lymph fluid to enter the node from multiple points and exit through fewer channels, ensuring thorough filtration.
4. Clarify the location and number of lymph nodes: Lymph nodes are distributed throughout the body, but there is no dense collection specifically in the feet and hands. The total number of lymph nodes in the human body is generally around 600, not 10,000.
5. Differentiate between lymph nodes and other lymphatic structures: Lymph nodes contain white pulp, not red pulp. Red pulp is found in the spleen, another organ of the lymphatic system, which is involved in filtering blood rather than lymph.