Where are pathogens filtered from lymph in the lymphatic system?

• A. Spleen
• B. Tonsils
• C. Lymph nodes
• D. Thymus

Answer: (C)

Verified step by step guidance

1. Understand the role of the lymphatic system: The lymphatic system is a network of tissues and organs that help rid the body of toxins, waste, and other unwanted materials. Its primary function is to transport lymph, a fluid containing infection-fighting white blood cells, throughout the body.
2. Identify the function of lymph nodes: Lymph nodes are small, bean-shaped structures that are part of the lymphatic system. They filter lymph fluid and trap pathogens such as bacteria and viruses, which are then destroyed by specialized white blood cells called lymphocytes.
3. Differentiate between lymph nodes and other lymphatic organs: The spleen, tonsils, and thymus are also part of the lymphatic system but have different functions. The spleen filters blood, the tonsils protect against pathogens entering through the mouth and throat, and the thymus is involved in the maturation of T-cells, a type of lymphocyte.
4. Recognize the location of lymph nodes: Lymph nodes are distributed throughout the body, with clusters found in areas such as the neck, armpits, and groin. They act as checkpoints where lymph is filtered and cleaned before it is returned to the bloodstream.
5. Conclude that lymph nodes are the primary sites for filtering pathogens from lymph: Given their specific role in filtering lymph and trapping pathogens, lymph nodes are the correct answer to where pathogens are filtered from lymph in the lymphatic system.