Stress initiates biological changes involving the autonomic and endocrine systems, as well as the system that helps the body ward off illnesses, the immune system.
The immune system is a body system used by the body to fight against infections and diseases caused by bacteria and viral entities (they are not organisms).
The immune system is composed of physical barriers such as the skin mucous membranes, and endothelia that fight against pathogenic infections.
In conclusion, stress initiates biological changes involving the autonomic and endocrine systems, as well as the system that helps the body ward off illnesses, the immune system.
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