immune system
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the immune system is made up of special cells, proteins, tissues, and organs. the immune system defends people against germs and microorganisms. through a series of steps called the immune response, the immune attacks organisms and substances that invade the body systems and cause disease.
lymph nodes:
Small, bean-shaped structures that produce and store cells that fight infection and disease and are part of the lymphatic system.
spleen:
The largest lymphatic organ in the body contains white blood cells that fight infection or disease. The spleen also helps control the amount of blood in the body and disposes of old or damaged blood cells.
bone marrow:
The yellow tissue in the center the bones produces white blood cells.
lymphocytes:
small white blood cells that play a large roll in defending the body against disease. The two types of lymphocytes are B-cells, which make antibodies that attack bacteria and toxins, and T-cells, which help ::destroy infected or cancerous cells. Killer T-cells are a sub-group of T-cells that kill cells that are infected with viruses and other pathogens or are otherwise damaged. Helper T-cells help determine which immune responses the body makes to a particular pathogen.
Thymus:
This small organ is where T-cells mature.
Leukocytes:
These white blood cells that identify and eliminate pathogens are the second arm of the innate immune system. The innate leukocytes include the phagocytes (macrophages, neutrophils, and dendritic cells), mast cells, eosinophils, basophils, and natural killer cells.
3 disorders:
1)Disorders of the immune system can result in autoimmune diseases, inflammatory diseases and cancer.
2)Immunodeficiency occurs when the immune system is not as strong as normal, resulting in recurring and life-threatening infections. (Like HIV/AIDS)
3)Autoimmunity results from, a hyperactive immune system attacking normal tissues as if they were foreign bodies.
lymph nodes:
Small, bean-shaped structures that produce and store cells that fight infection and disease and are part of the lymphatic system.
spleen:
The largest lymphatic organ in the body contains white blood cells that fight infection or disease. The spleen also helps control the amount of blood in the body and disposes of old or damaged blood cells.
bone marrow:
The yellow tissue in the center the bones produces white blood cells.
lymphocytes:
small white blood cells that play a large roll in defending the body against disease. The two types of lymphocytes are B-cells, which make antibodies that attack bacteria and toxins, and T-cells, which help ::destroy infected or cancerous cells. Killer T-cells are a sub-group of T-cells that kill cells that are infected with viruses and other pathogens or are otherwise damaged. Helper T-cells help determine which immune responses the body makes to a particular pathogen.
Thymus:
This small organ is where T-cells mature.
Leukocytes:
These white blood cells that identify and eliminate pathogens are the second arm of the innate immune system. The innate leukocytes include the phagocytes (macrophages, neutrophils, and dendritic cells), mast cells, eosinophils, basophils, and natural killer cells.
3 disorders:
1)Disorders of the immune system can result in autoimmune diseases, inflammatory diseases and cancer.
2)Immunodeficiency occurs when the immune system is not as strong as normal, resulting in recurring and life-threatening infections. (Like HIV/AIDS)
3)Autoimmunity results from, a hyperactive immune system attacking normal tissues as if they were foreign bodies.