Innate immunity consists of host defenses that involve anatomical barriers, sensor systems that recognize patterns associated with microbes, and phagocytic cells.
developed throughout life
substantially increases the host’s ability to defend itself.
Each time the body is exposed to a microbe, the adaptive defense system learns and remembers the most effective response to the antigen.
The barriers that separate and shield the interior of the body from the surrounding environment.
trap microbes in vacuole (phagosome); produce hydrogen peroxide, hypochlorous acid, oxidizing agents, death in 10-30 min.
Testing and Removal of Self-Reactive Lymphocytes
Humoral and cell-mediated immunity defense
Found in secretions
Generation of Lymphocyte Diversity by Gene Rearrangement