<span>The role of white blood cells in immune response is to protect the body against infections and foreign bodies. They do this by destroying pathogens (for example, a bacteria or virus), producing antibodies and producting antitoxins, which destroy the toxins released by pathogens.</span>
Answer:
1 = veins
2 = cardiovascular system
3 = fibrin
4 = target heart rate
5 = maximal heart rate
Herpes labialis is what you are looking for
