Components of the immune system

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The immune system includes:

* Innate immunity or (nonspecific immunity) which consist of 4 type of barriers:
1. Physical barriers
2. Physiological barriers
3. Cellular barriers
4. Cytokine barriers
* Adaptive immunity or (specific immunity)

These are further divided into humoral and cellular components.

The humoral components of the innate system include the complement system, the coagulation system, and cytokines. The cellular components include neutrophils, macrophages, monocytes, NK (natural killer) cells, eosinophils. Besides these, there is the anatomical barrier that includes mechanical factors, chemical factors, biological factors.