is a disease-fighting protein created
ELISA. 3. A/An __________ is a disease-fighting protein created by the immune system in response to the presence of a specific antigen. antibody. 4. A/An __________ is any substance that the body regards as being foreign and includes viruses, bacteria, toxins, and transplanted tissues.welling caused by an abnormal accumulation of lymph within the tissues is known as __________. lymphedema. 17. A/An __________ is a large white blood cell that can destroy substances such as cell debris, dust, pollen, and pathogens by the process of phagocytosis.