How Does the Immune System Work?
1. What is the immune system?
The immune system is a network of cells, tissues, and organs that work together to defend the body against any foreign substances such as viruses, bacteria, fungi, and abnormal cells.
2. How does the immune system work?
The immune system works by recognizing and attacking any foreign substances that enter the body through a process called an immune response. This response involves two types of immune cells: B cells and T cells.
When a foreign substance enters the body, B cells produce antibodies that are specific to that substance. These antibodies then bind to the foreign substance, marking it for destruction by other immune cells.
T cells, on the other hand, help to identify and attack infected cells or abnormal cells, such as cancer cells, that pose a threat to the body. This process is known as cell-mediated immunity.
The immune system also has a memory, meaning that once it has encountered a foreign substance, it can remember and respond to it more quickly and efficiently in the future.
3. What happens when the immune system doesn't work properly?
When the immune system doesn't work properly, it can either become overactive or underactive. An overactive immune system can lead to autoimmune diseases, where the immune system attacks healthy cells in the body. Underactive immune system, on the other hand, makes the body more susceptible to infections and diseases.
Some factors that can affect the immune system's ability to function properly include certain medications, stress, lack of sleep, poor nutrition, and age.
In conclusion, the immune system plays a crucial role in protecting the body against foreign invaders, and understanding how it works can help us maintain better health. By adopting healthy lifestyles and seeking medical attention when necessary, we can ensure that our immune system is functioning optimally for our overall wellbeing.
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