Tags: Health Topics | immune system | organ | body | defenses

Immune System: 9 Vital Organs Forging the Body's Defenses

By    |   Monday, 23 May 2016 06:47 PM

Organs and cells make up the immune system to keep germs out of the body and protect it from infection. This complex network battles foreign invaders that threaten to weaken or damage the immune system.

Organs in the lymph system act to help lymph nodes release lymphocytes, white blood cells that fight infection in areas throughout the body, Johns Hopkins Medicine explains.

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Here are nine lymphoid organs in the immune system:

1. Lymph nodes are located in all areas of the body, connected by lymphatic vessels. They act as filters and contain cells that trap pathogens, or germs, while activating antibodies, according to the U.S. National Library of Medicine.

2. Lymph vessels deliver the infection-fighting lymphocytes to organs and the bloodstream.

3. Blood vessels include veins, arteries, and capillaries to aid the flow of blood to immune system organs and cells.

4. Adenoids are two glands in the back of the nasal passage. White blood cells in the adenoids trap bacteria and viruses that are breathed in, preventing throat and lung infections.

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5. Bone marrow protects blood cells made in the bone. Defensive cells are produced in the bone marrow, then they move into the bloodstream and travel to organs and tissues for protection.

6. The spleen is located in the abdominal cavity. It stores defense cells that are later needed for the blood and organs. The spleen also houses blood platelets that help blood clotting when needed.

7. Peyer’s patches are lymphoid tissue in the small intestine. Cells within Peyer’s watch for germs in the intestinal area and combat infection when invaders are detected.

8. The thymus is located behind the breastbone. It develops in children and later becomes fat tissue. The thymus helps with the regulation of defense cells in the lymph nodes.

9. Tonsils provide protection in the back of the throat. Since germs often enter that area, the tonsils act quickly to activate the immune system. They contain lymphocytes.

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Organs and cells make up the immune system to keep germs out of the body and protect it from infection. This complex network battles foreign invaders that threaten to weaken or damage the immune system.
immune system, organ, body, defenses
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2016-47-23
Monday, 23 May 2016 06:47 PM
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