Immune Systems in the Human Body


Out of all the systems your body has, the immune is the one that is on the front lines fighting colds, viruses, and infections. It works in conjunction with your other systems to keep you healthy and running on all cylinders. To better care for your immune system, you have to get to know your immune system.


These are your first line of protection in your immune system. They help protect your body from any pathogens that try to enter from your nose and mouth. They are top-notch at doing this, but sometimes they need to be extracted when they are constantly becoming infected due to bacteria.

Lymph Nodes

Located throughout your body, they are the filters of waste, and conveyors of nutrients and lymph fluids to different parts of your body. Your lymph nodes are one of the essential elements of your immune system. When they are overtaxed due to illnesses, they tend to swell, and in more severe cases, be the target of cancer.

The Thymus

Though many would put this gland with another body system, it is closely related to the lymph nodes in the immune system. It plays a key role in the manufacture of T-lymphocytes (T Cells), one of the more critical types of white blood cells. It gets immature white blood cells from the bone marrow and teaches them how to attack foreign cells, like bacteria and viruses, in the body.

The Spleen

This part of the immune system recycles red blood cells and platelets. It also serves as storage for white blood cells. The spleen also plays a part in a fight the bacteria that can lead to pneumonia and meningitis. When this organ becomes enlarged, it is due to mononucleosis, some diseases of the liver, and some cancers. When it is ruptured because of an accident, it causes internal bleeding that can be life-threatening.

 The Appendix

Even though it is attached to the colon, it plays a part in the immune system. The appendix has lymphatic vessels and can play a role in fighting off pathogens and bacteria. Current studies say that it may play a large roll in preventing more severe diseases. When it is taxed to the limit, it can swell and rupture, leading to its removal.

Peyer’s Patches

These are found in different places in the small intestine. It keeps an eye on intestinal bacteria populations and can help to stop the growth of those bacteria, which can turn into pathogens. They are little egg-shaped patches of tissue.

Bone Marrow

This is the spongy tissue found in the center of the bones. They convey oxygen to many parts of your body and are also responsible for the manufacture of the white blood cells which go to the Thymus to be trained. Marrow also contains stem cells and platelets, which help with clotting. White blood cells combat foreign invaders in your body, such as infections and viruses.

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