Final answer:
A. Lymph nodes play a crucial role in white blood cell production. Doctors examine for swollen lymph nodes because they play a crucial role in white blood cell production and can indicate infections or medical conditions.
Step-by-step explanation:
Lymph nodes are examined for swelling because they play a crucial role in white blood cell production and are often targeted by bacteria and viruses.
Lymph nodes are small, bean-shaped organs located throughout the lymphatic system that function to remove debris and pathogens from the lymph. They filter lymph and store lymphocytes, which are specialized white blood cells that play a vital role in fighting infections.
Swollen lymph nodes are a common symptom of infections and certain medical conditions such as lymphoma. By examining swollen lymph nodes, doctors can gather valuable information about a patient's immune response and potential underlying health issues.