Kaplan Nursing Entrance Exam Practice 2026 – Comprehensive Prep

Lymph nodes play a crucial role in the lymphatic system by filtering lymphatic fluid and removing foreign particles, such as bacteria, viruses, and other pathogens. As lymph fluid circulates through the lymphatic system, it passes through these small, bean-shaped structures. The lymph nodes contain immune cells, particularly lymphocytes and macrophages, which recognize and respond to foreign particles. This filtering process is essential for the body's immune response, as it helps protect against infections and other diseases by allowing the immune system to detect and combat harmful substances before they can spread throughout the body.

The other options refer to functions not associated with lymph nodes. Transport of nutrients directly to the blood is primarily handled by the circulatory system through blood vessels. Storing glucose for energy is a function associated with the liver and muscle cells, not lymph nodes. The production of red blood cells occurs in the bone marrow, not in lymph nodes. This understanding of lymph nodes highlights their vital contribution to immune function and the maintenance of overall health.