How does the protective function of proteins occur?

Proteins are essential for the life of any organism. They take part in all vital processes. Protective function is one of the most important functions of proteins. Proteins recognize and neutralize foreign bacteria and viruses, providing immune protection. Proteins are also involved in the hardening of the upper parts of the skin. This protects the body from external influences. Special proteins help blood clot when cuts and injuries occur. This prevents blood loss. Protein molecules bind toxic substances and help eliminate them from the body.