Innateimmuniteettiin
Innate immunity is the first line of defense the body has against pathogens. It is a non-specific system, meaning it reacts the same way to all foreign invaders, regardless of their type. This system is present from birth and is crucial for immediate protection. Key components of innate immunity include physical barriers, such as the skin and mucous membranes, which prevent pathogens from entering the body. Chemical barriers, like stomach acid and enzymes in tears and saliva, also play a role in destroying invaders.
If a pathogen breaches these barriers, the innate immune system employs cellular defenses. Phagocytes, such as
The innate immune system also relies on a complex network of signaling molecules called cytokines. These molecules