How Our Immune System Fight Against Diseases

Vital role played by immune system:  protects our body from foreign insults like, germs, cell changes

What is the immune system made up off ?-----well, various organs, cells, and proteins complete our immune system

Enlightening the task of the immune system:

1. Fight harmful foreign substances to our body 
2. To fight disease-causing germs - bacteria, viruses, parasites or fungi,
3. To remove disease-causing germs from the body
4. Recognize and neutralize certain changes in our body for example cancer cells.

How is our immune system activated?

• activated by a antigens. 
• Certain examples of antigens: presented in form of proteins or enzyme activators by bacteria, fungi, viruses. 
• antigens are key for lock on special receptors in immune cells structure (immune system cells), 
• this allows cascade of crosstalk triggering messengers in body which act as alarm
• alarming state for contact of body with a disease-causing germ for the first time,- primary immunity
• following this it usually stores information about this first time recognition of  germ to antigen in human body and how the fight  was
• once same germ species come in contact again 
• immunes system recalls its memory recognizes the germ straight away and kill it faster – secondary immunity
• do you know? That our body has proteins on surface but not all are antigen and thus they don’t kill themselves
• Neither these proteins can trigger immune system own its own against our body cell
• Still sometimes the immune system make  mistakes
• mistakenly thinking that the body's own cells are foreign cell
• immune system get program and attacks healthy, harmless cells in the body- autoimmune response.