1. Name lymphoid organs and match to their corresponding functions. Name: Function: A) B) C) D) E) F) Filters and recycles aged red blood cell and provides immune surveillance and response G) Defenses against ingested or inhaled foreign pathogens H) Promotes repopulation of gut flora and fights off invading pathogens I) Prevents invasion of pathogens within mucosa of gastrointestinal tract J) Secretes several hormones and promotes T cell maturation 2. Name lymphatic trunks and ducts. A) B) C) D) E) F) G) Which duct collects the lymph in the body from the right thorax, arm, head, and neck? Which duct drains most of the lymph from the rest of the body? 3. Regional lymph nodes are mostly located at the and regions. 4. Identify the lymphoid organ and the structure and name the associated cell type or function of the structure. Name of lymphoid organ: Name of structure: Associated cell type: Name of lymphoid organ: Name of structure: Associated function: 5. How does an ELISA indirectly detect infection by a disease-causing agent? 6. What is the function of the secondary antibody and chromogen in an ELISA? .