Come, meet our immune system together

Come, meet our immune system together

There are many bacteria and viruses in nature. We will get sick because of infection with these bacteria or viruses, but why can we overcome these bacteria and viruses so that our body will recover quickly after illness? And why do some people often catch a cold, but some people do not catch a cold? Why can you not get sick after the vaccine?

If so many "why" want to answer one by one, we should introduce our human protection network-the immune system. If our body is compared to a country, the immunization system is the army and police of this country. It always protects our bodies and resist the invasion of pathogenic microorganisms.

So what is the immune system?

The immune system involves countless complicated interaction between countless cells, special substances and organs. It is in a state of combat reserve at any time to prevent diseases, and can clearly know when, where, and how to take appropriate action to destroy the invasive pathogens without harming other cells of the human body. The immune system consists of immune organs, immune cells and immune activity.

What does the immune organs include? What kind of skills do they have to protect our bodies?

Immune organs are divided into central immune organs and peripheral immune organs. Central immune organs are a place with mature immune cells. The peripheral immune organs are spread all over the body, forming an effective protective barrier in all parts of the body.

Bone marrow and thymus are central immune organs. They are like military schools of the army, cultivating functional cells with different skills. Bone marrow is the main hematopoietic organ of humans and other mammals, and is an important birthplace of various blood cells. The thymus is a place for T cell differentiation and maturity, and is the earliest immune organs formed. The thymus is like a training camp, training a group of "soldiers". When the "soldiers" are slowly mature, as the age grows, the thymus slowly shrinks and gradually loses its function.

The peripheral immune organs include spleen, lymph nodes and tonsils. The spleen is a very important lymphatic organs. The spleen and lymph nodes spread throughout the body are the main organs to perform immune function. The lymph nodes are connected to the lymphatic vessels to form the lymphatic circulation system. When there is a pathogen invasion in the body, the immune cells quickly reach the part of the body through this network, and the remaining garbage recovers the lymph nodes through this network. The tonsils can produce lymphocytes and antibodies, which plays the defense function of antibacterial antiviral, which is an important protection barrier in the throat.

What are the immune cells?

When we go to the hospital to draw blood for examination, we will check indicators such as lymphocytes and neutral granulocytes. Their elevated or reduced will be worrying. These cells, such as macrophages, neutral granulocytes, eosinophils,,, eosinophils,,,,, are eosinophils,,, eosinophils,,, eosinophils,,,, are eosinophils, eosinophils,,, eosinophils,,,, are eosinophils, eosinophils,,, eosinophils,,,, are eosinophils, eosinophils,,, eosinophils,,, are eosinophils, eosinophils,,, eosinophils,,,, are eosinophils, eosinophils,,, eosinophils,,,, are eosinophils, eosinophils,,,, eosinophils,,, are eosinophilized Alkaliocytes, lymphocytes, dendritic cells, NK cells, etc. are immune cells, and immune cells are like "immune soldiers".

What are the effects of immune activity?

Immunoral activity is some immune molecules, usually refers to immunoglobulin, tonic, cytokines, cell adhesion molecules, human white blood cell differentiation antigens, etc., just like "army" soldiers with different soldiers, participating in the body's immune response or immune regulation of each. Link.

In the process of invasion of microorganisms in the immune system, different immune cells and immune activated substances cooperate with each other, identify microorganisms and foreign antigens that enter the body, mobilize the corresponding cells and molecules to launch a comprehensive three -dimensional attack, restrict the reproduction of microorganisms in the body , Until completely eliminated and cleared.

Our immune system is like a precise machine. Each part is uniformly collaborated to defend our body at all times. We should also protect our immune system through scientific and reasonable methods, strive to improve our immunity, better and better with it with Diseases fight.

Source: Gansu Province Disease Prevention and Control Center

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