Chapter 14: The Immune System
Chapter 14 talks about the immune system and how it protects us from dangerous invaders. Immunizing agents and allergenic extracts are biologics. They are chemical agents that produce biological responses inside the body. Vaccinations are highly effective compared to other drugs, the history of smallpox can prove of it. When a microorganism enters the body, lymphocytes are activated to provide antibodies. Lymphocytes attempts to resist infection by invading the pathogens with physical and chemical attacks. Immunity is the ability to infection through activation of specific defenses. The blood contains T cells, B cells and natural killer cells to directly attack invaders, attack infected cells and release antibodies. There is active immunity