Where does lymph travel before being returned to the bloodstream?

• A. Liver
• B. Lymph nodes
• C. Spleen
• D. Heart

Answer: (B)

Lymph travels through the lymphatic system, and before being returned to the bloodstream, it typically passes through the lymph nodes. The lymph nodes play a critical role in filtering lymph fluid, which helps remove pathogens and foreign substances. They are strategically located throughout the body, serving as checkpoints where the lymph is enriched with immune cells that can respond to any detected threats.

Once the lymph is processed in the lymph nodes, it continues its journey through larger lymphatic vessels until it ultimately drains into the bloodstream via the thoracic duct or the right lymphatic duct. This process is vital for maintaining fluid balance in the body and for the proper functioning of the immune system.