The composition of the immune system and the role of its components

1. Immune organs. It can be divided into central immune organs and peripheral immune organs. The former is the site of immune cell generation, differentiation, and maturation; The latter is the site of T and B lymphocyte colonization and proliferation, and the main site of immune response.

2. Immune cells. Its main function is to mediate cellular immunity. In pathological situations, it can be involved in delayed-type hypersensitivity reactions and organ-specific autoimmune diseases. Activated NKT cells have cytotoxic and immunomodulatory effects.

3. Immune molecules. Identify and remove mutated tumor cells, senescent cells, dead cells, or other harmful components from the body.

4. Immune tissue. Identification and removal of foreign invading antigens, such as pathogenic microorganisms.

Immune cells are made up of T lymphocytes and B lymphocytes.

T lymphocytes include surface markers and T cell subsets of T cells.

B lymphocytes include surface markers and B cell subsets of B cells.

The immune system is composed of immune organs (bone marrow, spleen, lymph nodes, tonsils, small intestine collecting lymph nodes, appendix, thymus, etc.), immune cells (lymphocytes, mononuclear phagocytes, neutrophils, basophils, eosinophils, mast cells, platelets (because platelets contain IgG), etc.), and immunoactive substances (antibodies, lysozyme, complement, immunoglobulins, interferon, interleukin, tumor necrosis factor and other cytokines). The immune system has the role of immune surveillance, defense, and regulation. This system is composed of immune organs (bone marrow, spleen, lymph nodes, tonsils, small intestine collecting lymph nodes, appendix, thymus, etc.), immune cells (lymphocytes, mononuclear phagocytes, neutrophils, basophils, eosinophils, mast cells, platelets (because platelets contain IgG), etc.), and immunoactive substances (antibodies, lysozyme, complement, immunoglobulins, interferon, interleukin, tumor necrosis factor and other cytokines).

The immune system is divided into innate immunity (also known as non-specific immunity) and adaptive immunity (also known as specific immunity), of which adaptive immunity is further divided into humoral immunity and cellular immunity. The immune system is the most effective way to defend against pathogen invasion**, which can detect and remove foreign bodies, foreign pathogenic microorganisms and other factors that cause fluctuations in the internal environment. However, its hyperfunction can cause damage to its own organs or tissues.

1.Identification and removal of foreign invading antigens, such as pathogenic microorganisms. This function of preventing the invasion of external pathogens and removing invading pathogens and other harmful substances is called immune defense.

Protects the human body from viruses, bacteria, pollutants and diseases. 2.Identification and removal of mutations in the body.

Tumor cells, senescent cells, dead cells, or other harmful components. This ability to detect and remove the "non-self" components that appear in the body at any time is called immune surveillance. Removal of metabolic waste products and the dead and injured bodies of the virus left behind by immune cells in the fight against the virus must be eliminated by immune cells.

3.The environment within the immune system is stabilized through autoimmune tolerance and immunomodulation. Repair immune cells repair damaged organs and tissues, allowing them to return to their original functions.

There is no substitute for a healthy immune system, but it can still be ineffective due to continued intake of unhealthy foods.

The immune system is made up of immune organs, immune cells, and immune molecules. Immune organs include central immune organs, central immune organs, immune cells include constituent cells of innate immunity, phagocytic cells, dendritic cells, etc., and immune molecules include membrane molecules and secretory molecules. The immune system is made up of immune organs, immune cells, and immune molecules.

Immune organs include central immune organs, central immune organs, immune cells include constituent cells of innate immunity, phagocytic cells, dendritic cells, etc., and immune molecules include membrane molecules and secretory molecules.

The immune system is made up of immune organs, immune cells, and immunoactive substances.

1. Immune organs: bone marrow, spleen, lymph nodes, tonsils, small intestine collecting lymph nodes, appendix, thymus, etc.

2. Lymphocytes, mononuclear phagocytic cells, neutrophils, basophils, eosinophils, mast cells, platelets, etc., 3. Immunoactive substances: antibodies, lysozyme, complement, immunoglobulins, interferon, interleukin, tumor necrosis factor and other cytokines.