The human body has an immune system made up of specialised cells, tissues, organs, and proteins etc which help in fighting various germs and microorganisms every day. The immune system is the defence force of our body. Basically, the immune system does the role of keeping everyone healthy and safeguarding us against any infections. Any problems that occur with the immune system can directly affect the health of an individual and lead to infection or illness.
SOME KEY FACTS ABOUT THE IMMUNE SYSTEM AND CELLS
- Lymph nodes are one of the major components of the immune system. It helps in production and storage of cells that help in fighting against any kind of infection or disease that occur in the lymphatic system.
- The largest lymphatic organ in the body is spleen which consists of white blood cells for fighting infection and disease.
- T cells and B cells are two kinds of lymphocytes which are responsible for attacking the toxins, bacteria, and cancerous cells in order to shield the human body from diseases.
- T cells are the coordinators of the fight that occurs between immune system and disease. If T cells cannot function, then the entire line of defence falls apart and body catches infections.
- B cells are responsible for the production of millions of antibodies including the proteins that bind to antigens. This helps in outnumbering the foreign body and killing any infectious organism.
- Whenever the antigens try to penetrate the body, various kinds of cells work together as a unit for identification of the foreign body and for preparing a line of defence. Like, triggering B lymphocytes for production of antibodies which kills antigens.
- Antigens are proteins which are specific to individual microorganisms. This helps in identification of any foreign invader organism that tries to enter our body.
- The thymus is the part that instructs white blood cells the difference between cells in the body and cells that try to invade the body. The white blood cells or phagocytes surround the pathogens and neutralise them.
When antigens enter the body, B lymphocytes is triggered by various cells for production of antibodies to lock onto specific antigens. T cells or killer cells destroy the antigens that are tagged by antibodies along with signalling white blood cells for destruction. Once produced, the antibodies stay in the body so that if a person encounters that antigen again, the antibodies are ready to fight.