Lymph nodes are part of which body system?

Lymph nodes are part of which body system?

• A. Lymphatic system
• B. Circulatory system
• C. Nervous system
• D. Digestive system

Answer: (A)

This question tests how we classify body systems and the specific role of lymph nodes. Lymph nodes are part of the lymphatic system, a network that drains tissue fluid (lymph) and routes it back into the bloodstream while also providing immune surveillance. Lymph nodes act as filters along the lymphatic vessels, housing immune cells such as T cells, B cells, and macrophages to detect and respond to pathogens. This combination of fluid transport and immune function centers them in the lymphatic system, not in the circulatory, nervous, or digestive systems. So, they belong to the lymphatic system.

This question tests how we classify body systems and the specific role of lymph nodes. Lymph nodes are part of the lymphatic system, a network that drains tissue fluid (lymph) and routes it back into the bloodstream while also providing immune surveillance. Lymph nodes act as filters along the lymphatic vessels, housing immune cells such as T cells, B cells, and macrophages to detect and respond to pathogens. This combination of fluid transport and immune function centers them in the lymphatic system, not in the circulatory, nervous, or digestive systems. So, they belong to the lymphatic system.