Functions of the Immune System
Disease description:
My physical condition is not very good, and my doctor told me that my immunity is low. I would like to ask the doctor: what is the function of the immune system?
Doctor's answer (1)
Dr. Liu Feng
The functions of the immune system mainly include the following three aspects:
1. Immune defense: Effectively prevents invasion by external pathogens (such as bacteria, viruses, etc.) and promptly clears pathogens and other harmful substances that have already entered the body, thereby protecting the body from infection.
2. Immune surveillance: Continuously monitors and identifies non-self-components that arise within the body, such as tumor cells, senescent cells, and apoptotic cells, and promptly eliminates these abnormal cells to prevent tumor development and persistent viral infections.
3. Immune homeostasis: Maintains stability of the internal environment of the immune system through mechanisms of immune tolerance and immune regulation, ensuring normal immune function. This function is also crucial for repairing damaged organs and tissues and restoring their normal physiological functions.
