Guide to Immunity Notes on EduRev

Introduction to Immunity
Immunity is the ability of the body to resist infections and other harmful substances. It is a complex process that involves various organs, cells and molecules.

Types of Immunity
There are two types of immunity - innate immunity and adaptive immunity.

Innate Immunity
Innate immunity is the first line of defense against pathogens. It is non-specific and provides immediate protection. It involves physical and chemical barriers, such as skin and mucous membranes, as well as immune cells, such as phagocytes and natural killer cells.

Adaptive Immunity
Adaptive immunity is a specific response to a particular pathogen. It involves the recognition of antigens by immune cells, such as T and B cells, and the production of antibodies. Adaptive immunity takes time to develop, but it provides long-lasting protection.

Components of Immune System
The immune system is composed of various organs, cells and molecules, including:

- Bone marrow
- Thymus
- Spleen
- Lymph nodes
- White blood cells (leukocytes)
- Antibodies
- Cytokines

Immune Response
The immune response is a coordinated series of events that occur when the body is exposed to a pathogen. It involves the activation of immune cells, the production of antibodies, and the elimination of the pathogen.

Immunodeficiency Disorders
Immunodeficiency disorders are conditions in which the immune system is unable to function properly. They can be congenital or acquired and can lead to increased susceptibility to infections, autoimmune disorders and cancer.

Conclusion
Immunity is a complex process that is essential for the health and survival of an organism. Understanding the different types of immunity, components of the immune system, and immune response is crucial for the prevention and treatment of various diseases. EduRev provides comprehensive notes on immunity for NEET aspirants.

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