The Design of the Immune System
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Remember that the goal of the immune system is to identify microbial invasion and/or cell injury and then start a sequence of steps to remove the invaders or injured cells so that repair can begin and then form protection against future challenges that are the same or similar.
The system is complex and is designed to work together through two broad categories:
Innate: a barrier that is designed to keep things from getting into the body. Examples include: Mucosal surfaces, skin, chemicals in the stomach, anything that helps separate you from the outside world. The innate system is just what it sounds like, it is innate it is always present and does not become stronger with exposure and has a limited response.
Knowing the timing of when something is happening in the body is important to know as it can tell you what is going on.
acquired/adaptive: Following injury or invasion this portion of the immune system is activated after a breach of one of the innate barriers. It signals this breach with signaling with cytokines. Cytokines allow for communication between cells and directs the immune response.
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