Allergies - Chapter Notes, Microbiology, Semester, Engineering, Biotechnology Notes | EduRev

: Allergies - Chapter Notes, Microbiology, Semester, Engineering, Biotechnology Notes | EduRev

 Page 1


DISORDERS OF THE IMMUNE 
SYSTEM: 
ALLERGIES 
Page 2


DISORDERS OF THE IMMUNE 
SYSTEM: 
ALLERGIES 
Your Immune System 
The organs involved with the immune system are the 
lymphoid organs, which affect growth, development, 
and the release of lymphocytes. 
The blood vessels and lymphatic vessels are important 
parts of the lymphoid organs, because they carry the 
lymphocytes to and from different areas in the body 
Each lymphoid organ plays a role in the production and 
activation of lymphocytes. Lymphoid organs include: 
adenoids, tonsils, appendix, lymph nodes, spleen, 
Peyer’s patches (lymph tissue in your small intestine), 
thymus 
 
Page 3


DISORDERS OF THE IMMUNE 
SYSTEM: 
ALLERGIES 
Your Immune System 
The organs involved with the immune system are the 
lymphoid organs, which affect growth, development, 
and the release of lymphocytes. 
The blood vessels and lymphatic vessels are important 
parts of the lymphoid organs, because they carry the 
lymphocytes to and from different areas in the body 
Each lymphoid organ plays a role in the production and 
activation of lymphocytes. Lymphoid organs include: 
adenoids, tonsils, appendix, lymph nodes, spleen, 
Peyer’s patches (lymph tissue in your small intestine), 
thymus 
 
Page 4


DISORDERS OF THE IMMUNE 
SYSTEM: 
ALLERGIES 
Your Immune System 
The organs involved with the immune system are the 
lymphoid organs, which affect growth, development, 
and the release of lymphocytes. 
The blood vessels and lymphatic vessels are important 
parts of the lymphoid organs, because they carry the 
lymphocytes to and from different areas in the body 
Each lymphoid organ plays a role in the production and 
activation of lymphocytes. Lymphoid organs include: 
adenoids, tonsils, appendix, lymph nodes, spleen, 
Peyer’s patches (lymph tissue in your small intestine), 
thymus 
 
Disorders of the immune system 
When the immune system does not function properly, it leaves 
the body susceptible to an array of diseases 
Allergies and hypersensitivity to certain substances are 
considered immune system disorders 
Examples of immune disorders include: 
•cancer of the immune system (leukemia) 
•autoimmune diseases, such as juvenile diabetes, rheumatoid 
arthritis, and anemia 
•immune complex diseases, such as viral hepatitis and malaria 
•immunodeficiency diseases, such as acquired 
immunodeficiency syndrome (AIDS)  
Page 5


DISORDERS OF THE IMMUNE 
SYSTEM: 
ALLERGIES 
Your Immune System 
The organs involved with the immune system are the 
lymphoid organs, which affect growth, development, 
and the release of lymphocytes. 
The blood vessels and lymphatic vessels are important 
parts of the lymphoid organs, because they carry the 
lymphocytes to and from different areas in the body 
Each lymphoid organ plays a role in the production and 
activation of lymphocytes. Lymphoid organs include: 
adenoids, tonsils, appendix, lymph nodes, spleen, 
Peyer’s patches (lymph tissue in your small intestine), 
thymus 
 
Disorders of the immune system 
When the immune system does not function properly, it leaves 
the body susceptible to an array of diseases 
Allergies and hypersensitivity to certain substances are 
considered immune system disorders 
Examples of immune disorders include: 
•cancer of the immune system (leukemia) 
•autoimmune diseases, such as juvenile diabetes, rheumatoid 
arthritis, and anemia 
•immune complex diseases, such as viral hepatitis and malaria 
•immunodeficiency diseases, such as acquired 
immunodeficiency syndrome (AIDS)  
Autoimmune diseases 
autoimmune rx’s can be directed against  
•the brain ?multiple sclerosis  
•the gut in Crohn's disease 
•other autoimmune diseases such as systemic lupus 
erythematosus (lupus) 
•damage to certain tissues by the immune system 
may be permanent, as with destruction of insulin-
producing cells of the pancreas in Type 1 diabetes 
mellitus 
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