What is the Function of the Immune System?


The function of the immune system is to protect your mind and your body from dysfunction, serious harm and injury.

This includes defending you from the continuous onslaught of outside invaders, such as Chicken Pox, COVID-19 and the Flu, some familiar, some unknown.

Not only does your immune system protect you from all those nasty germs from the out side, such as bacteria, fungi, toxins and other harmful substances, but also from bacteria and substances on the inside.

Your immune system made up of various different organs, cells, proteins and tissue working together in perfect synergy.

Consisting of many complex parts and additional factors this post will give you a little background information and a better understanding of what how your immune system functions, what it consists of how it fights to defend and protect you from harmful viruses and bacteria.

Immunity Types

Immunity to a disease is achieved through the presence of antibodies to that disease in a person’s system.

Antibodies are proteins produced by the body to neutralize or destroy toxins or disease-carrying organisms.

Antibodies are disease-specific for example the influenza antibody will protect a person who is exposed to the influenza virus, but will have no effect if exposed to the chickenpox virus.

Active & Innate

  1. The Adaptive Immune System (acquired immunity)
  • Active Immunity, develops over time and produces cells which are called antibodies that protect you from a specific invader can be short term, long term or life long.
  • The Passive Immunity is activated when you are given antibodies to fight infection instead of using antibodies produced by your own immune system.

2. The Innate Immune System (natural immunity)

Innate immunity takes place immediately and is non-specific both internal and external.

  • Internal Defenses
  • External Defenses

Also know as natural immunity or genetic immunity and is lifelong.

Immune System Sub-Systems

Your lymphatic system consists of lymphatic vessels, similar to the veins and capillaries of the circulatory system.


1. Lymphatic System: A network of channels throughout the body that carries lymphocytes to the lymphoid organs and bloodstream.

2. Complement System: Made up of numerous distinct plasma proteins.

3. Lymphoid Organs: Made up of organs such the thymus and bone marrow, as well as secondary lymphatic tissues.

If our immune system becomes compromised due to a deficiency or has become weakened due to a underlying health condition, a hormone imbalance, obesity, anorexia, malnutrition, stress, depression or old age it will have great difficulty in fighting viruses, particularly the ones that are new to your system and more aggressive.

So, What Does the Immune System Do Exactly?

It fights disease-causing germs (pathogens) such as bacteria, viruses, parasites and fungi, and expels them from the body in varying different ways.

  • Is able to recognize and neutralize harmful substances from the environment.
  • Can fight any disease-causing changes in the body, such as cancer cells.
  • Considerably slows down the degenerate and functionality that comes with old age
  • Ensures good measures of life force and vitality.
The Immune System can considerably slow down the degeneration of muscle and bone resulting from the processes of old age.

So We Can All Agree?

That our awesome immune system is, in my opinion, one of the major wonders of the world.

The Immune System’s function is essential to our very existence and happiness which is a by-product of good health, it is literally our life force and to me, that’s a beautiful thing.

It makes perfect sense then, that you take the very best care of your immune system that you can in return, and of that fact I am 100% confident you will agree.

Please leave any advice, comments or contributions which are always encouraged and always very much appreciated.

Stay Safe, Stay Healthy, Stay Strong


Mitch X:-).


*Please note the information contained in this post is intended for the purpose of general information and should not be used as a substitute for the individual expertise and judgement of healthcare professionals.