This vast network of cells and tissues is constantly on the lookout for invaders, and once an enemy is spotted, a complex attack is mounted.
The immune system is spread throughout the body and involves many types of cells, organs, proteins, and tissues. Crucially, it can distinguish our tissue from foreign tissue — self from non-self.
If the immune system encounters a pathogen, for instance, a bacterium, virus, or parasite, it mounts an immune response.
The immune system needs to be able to tell self from non-self. It does this by detecting proteins that are found on the surface of all cells. It learns to ignore its own or self proteins at an early stage.
Keeping our immune system healthy is key to its proper function and fighting abilities. Without it, we are left open to infection and illness.
Grab this Free Guide to learn how to boost your immunity and how to help prevent illness.