The main function of lymph nodes is to
- A. pump lymph around the body
- B. produce red blood cells
- C. filter lymph and provide a site where lymphocytes multiply
- D. absorb glucose from the small intestine
Explanation
Nodes are packed with macrophages that trap bacteria and debris carried in the lymph, and with lymphocytes that divide there when an antigen is met, which is why nodes in the neck swell during a throat infection. The lymphatic system has no pump of its own and relies on skeletal muscle movement and valves. Red cell formation belongs to red bone marrow.