The human immune system is a complex network of cells, tissues, and organs that work together to protect the body from harmful pathogens, such as germs and bacteria. When the immune system detects the presence of these pathogens, it launches a series of responses to neutralize and eliminate them.
The immune system has two main components: the innate immune system and the adaptive immune system. The innate immune system is the body's first line of defense and includes physical barriers, such as the skin and mucous membranes, as well as various immune cells that can quickly recognize and attack pathogens.
The adaptive immune system is more specialized and is activated when the innate immune system is unable to clear the pathogen. This system is responsible for producing antibodies, which are specific proteins that recognize and bind to pathogens, marking them for destruction by other immune cells.
Overall, the immune system plays a critical role in maintaining the body's health and fighting off infections. However, certain factors, such as a weakened immune system or exposure to particularly virulent pathogens, can compromise the body's ability to fight off germs and bacteria, leading to illness or disease.