Our body is made up of different cells and due to these cells , our body transforms . Cell is the structural and functional unit of life. They are the real initiators of the body formation . First cells are formed , then tissues and when tissues combine together , they take initiative to form body organs . After that when tissues combine with one another , they take an initiative to form body organs and body organs form organ system like digestive system , respiratory system , nervous system , excretory system etc. If we see all these parameters combine then we can see the real human body .
As we know all the Organ systems perform their particular work like digestive system performs digestion , while on the other side respiratory system performs respiration . But one system that allows all other systems to perform their functions well and that system is called as IMMUNE SYSTEM.
The system that defends human body against infections. This is actually a complex network of cells and proteins and keeps a record of every microbe it has ever defeated so it can recognize and destroy the microbe .
Types of Immune System ;
There are three types of immune system of human body ;
- Innate Immune system
- Adaptive Immune system
- Passive Immune system
- Innate Immune system ; This immune system is a natural, which we have it already during the birth . This is a type of general protection. For eg, the skin of human body acts as a shield or barrier to tackle to invading infections , innate immune system immediately confirms the incoming virus or bacteria.
- Adaptive Immune system ; This immune system is a active immune system because this develops immunity throughout our life. This system get active when we are tackling any diseases .
- Passive Immune system ; This immune system we acquire from other source . It does not remain for long time
The Immune system and microbial infection
- The immune system keeps a record of every microbe it has ever defeated, in types of white blood cells known as memory cells . It can confirms the microbial infection immediately and destroy . This process continuously takes place i.e recognition of microbes and then destroy.
- Flu and common cold are some best examples of some infections , have to fought a lot times because so many viruses of the same type can cause these illnesses.
Parts of Immune System
- White Blood Cells
- Lymphatic System
- Bone Marrow
- Complement System
- White Blood cells ; These are the important part of immune system. They are the part of lymphatic system and formed in the bone marrow. They look for microbes such as bacteria , viruses , parasites and fungi etc , and move through blood and tissue in whole body . When they confirm that the microbe is invading then they immediately attack on them and destroy.
- white blood cells include lymphocytes ( such as B-cells , T-cells and natural killer cells ) and many other kind of cells that help in the immune process.
- Lymphatic system ; The lymphatic system is a connection of weak tubes throughout the body . The actual role of this system are to :
Manage the fluid levels in the body
React to bacteria
Deal with cell products that otherwise would result in diseases
Deal with cancer cells
Absorb some of the fats in our diet from intestine.
The lymphatic system is made up of lymph nodes which trap microbes , lymph vessels and white blood cells
- Bone Marrow ; Bone is a spongy tissue inside some of your bones , such as your hip and thigh bones bones . It contains stem cells . These cells can develop into the red blood cells that carry oxygen through your body, the white blood cells that fight infections , and the platelets that help in blood clotting .
- Thymus ; The thymus filters and monitors our blood content. It produces the white blood cells called T-lymphocytes.
- Antibodies ; Antibodies are the organisms that help to fight microbes or poisons . They do this by recognizing substances called antigens on the surface of the microbe. , or in the chemicals they produce.
- Spleen ; It is a blood – filtering organ that remove microbes and destroy old or damaged red blood cells . It also makes diseases fighting components of the immune system like antibodies and lymphocytes.
- Complement system ; The compliment system is made up of proteins whose actions compliment the work done by antibodies .
Other Body Part’s Defense Against Microbes
- Lungs – mucous in the lungs traps foreign particles, and small hair wave the mucous upwards so it can be coughed out
- Digestive Tract – The mucous lining contains antibodies, and the acid in the stomach can kill most microbes.
- Skin – This acts like a barrier that secrets oil with bacteria – killing properties.
How Does The Immune System Works?
When the body feels foreign antigens , the immune system works to recognize the invasion of that antigens and get rid of them .
B lymphocytes are triggered starts to produce antibodies. These antibodies are specialized proteins that lock onto particular antigens. The antibodies stay in person’s body. That way , if the immune system encounters that antigens again, the antibodies are ready to do their job.
This is how immunizations prevent some diseases. An immunization introduces the body to an antigen in a way that does not make someone sick. But it does let the body make antibodies that will protect the person from future attack by the germ.
Although antibodies can recognize an antigen and lock onto it, they can’t destroy it without help. Antibodies also can;
- Neutralize toxins produced by different organisms
- Activate a group of proteins called complement that are part of the immune system. Complement helps kill bacteria, viruses or infected cells
These specialized cells and parts of the immune system offer the body protection against diseases. This protection is actually called immunity.
Do’s And Dont’s;
- Do exercise daily because this leads to increase our body capacity and also polishes our body organs.
- Eat green vegetables instead of junk food.
- Make proper time table of sleeping and wake up.
- If you do not have enough time for physical exertion that must do the Yogic activities.