Immune System Research
INATE SYSTEM- Barriers skin nose Hair macrophages: Macrophages reside in most tissues and are usually the first immune cells to encounter pathogens Macrophages also release cytokines that recruit other innate immune cells, principally neutrophils, to the site neutrophils. Neutrophils normally circulate in the blood When they receive a cue from macrophages, they can leave the blood vessel and enter the infected tissue where they help to destroy the invaders. Once the dangerous pathogens have been eliminated and the wound has healed redness, warmth, swelling, and pain will abate Theadaptive immune system is characterized by three unique features: specificity, diversity, and memory. SPECIFIC We say the adaptive immune system is specific because it recognizes and defends us against particular threats—a specific virus, for example. It is very important that the immune system be able to discriminate among targets so that it does not attack components of our own...