What Is the Innate Immune System?
Humans and animals are constantly exposed to a variety of foreign particles and infectious agents such as bacteria, viruses, fungi and other parasites. It has been noticed that if a person suffers from certain diseases, for example, measles, the same disease does not attack him again because he is immune to that disease.
The system that protects body from various infections and diseases is termed as body immune system. However, the term innate immune system refers to the mechanisms used by the body to protect against all environmental agents, which may include food items, chemicals, drugs, diseases and others.
Innate immunity is the body’s own immune system, which is always available to protect the body. When pathogens enter into the body, they are quickly attacked by the components of the defense system and are killed at the same time. This is the first line of defense in most plants and animals.
Innate immunity consists of four kinds of barriers, which are mentioned below:
4. Inflammatory barriers