Wonderful Immune System

              The Amazing Wonderful Incredible Immune System

The immune system has a vital role: It protects your body from harmful substances, germs and cell changes that could make you ill. It is made up of various organs, cells and proteins.

The primary purpose of your immune system is to protect against pesky, persistent bacteria that want nothing more than to attack your body, breaking it down to make it more susceptible to injury and illness. Your immune system is the gatekeeper for what gets in and what stays out of your body.

                                                 True, the brain is the body's command centre

But the immune system—unlike our organs—is not in one place. Immune cells rove freely through the blood and into most of our tissues and can respond relatively independently to local conditions.

                                                       How Does the Immune System Work?

When the body senses foreign substances (called antigens), the immune system works to recognize the antigens and get rid of them. B lymphocytes are triggered to make antibodies (also called immunoglobulins). These proteins lock onto specific antigens.

The immune system keeps a record of every microbe it has ever defeated, in types of white blood cells (B- and T-lymphocytes) known as memory cells. This means it can recognise and destroy the microbe quickly if it enters the body again, before it can multiply and make you feel sick.

A third mechanism used by antibodies to eradicate viruses, is the activation of phagocytes. A virus-bound antibody binds to receptors, called Fc receptors, on the surface of phagocytic cells and triggers a mechanism known as phagocytosis, by which the cell engulfs and destroys the virus.

                                       Antibodies bind to viruses, marking them as invaders

The white blood cell is attracted to the bacteria because proteins called antibodies have marked the bacteria for destruction. These antibodies are specific for disease-causing bacteria and viruses. When the white blood cell catches the bacteria it goes about "eating" it in a process called phagocytosis.

The immune system is designed to monitor, recognise, and even remember the virus and take action to eliminate it, when a virus invades healthy cells. The immune system does this by releasing chemicals that trigger virus-fighting cells—which are then sent to wipe out the enemy.

Viruses make us sick by killing cells or disrupting cell function. Our bodies often respond with fever (heat inactivates many viruses), the secretion of a chemical called interferon (which blocks viruses from reproducing), or by marshalling the immune system's antibodies and other cells to target the invader.

                                                                     In the Bone marrow

That is where most immune system cells are produced and then also multiply. These cells move to other organs and tissues through the blood. At birth, many bones contain red bone marrow, which actively creates immune system cells.

Immune System Organs. The key primary lymphoid organs of the immune system include the thymus and bone marrow, as well as secondary lymphatic tissues including spleen, tonsils, lymph vessels, lymph nodes, adenoids, skin, and liver.

 

 Psalm chapter 139 verse 14:-    14  I praise you because in an awe-inspiring way I am wonderfully made. Your works are wonderful, I know this very well.
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Even if you find this page a little difficult to understand, you will still no doubt be impressed by the complexity and versatility of the immune system. If people think that this amazing system came about by natural selection then they really were born under a gooseberry bush. If you wish for a simple easy to understand explanation of the immune system please read the poem below.