Question

Define immune system
GPT 3.5
The immune system is a complex network of cells, tissues, and organs that work together to defend the body against harmful organisms and substances. Its main function is to recognize and destroy potentially harmful pathogens, such as bacteria, viruses, fungi, and parasites, while also preventing the growth of cancerous cells. The immune system is capable of distinguishing between the body's own cells (self) and foreign substances (non-self) in order to mount an appropriate response. This response can involve various mechanisms, including the production of antibodies, activation of specialized immune cells, and the release of chemicals to eliminate or neutralize the threat. The immune system also has the ability to remember specific pathogens it has encountered before, enabling a faster and more efficient response upon subsequent exposure.