When the body senses foreign substances called antigens , the immune system works to recognize the antigens and get rid of them. B lymphocytes are triggered to make antibodies also called immunoglobulins. These proteins lock onto specific antigens. After they're made, antibodies usually stay in our bodies in case we have to fight the same germ again. That's why someone who gets sick with a disease, like chickenpox, usually won't get sick from it again. This is also how immunizations vaccines prevent some diseases.
An immunization introduces the body to an antigen in a way that doesn't make someone sick. But it does let the body make antibodies that will protect the person from future attack by the germ. Although antibodies can recognize an antigen and lock onto it, they can't destroy it without help. That's the job of the T cells. They destroy antigens tagged by antibodies or cells that are infected or somehow changed. Some T cells are actually called "killer cells. These specialized cells and parts of the immune system offer the body protection against disease.
This protection is called immunity. White blood cells are bigger than red blood cells and normally are fewer in number. When a person has a bacterial infection, the number of white cells can increase dramatically. The white blood cell count shows the number of white blood cells in a sample of blood. A normal white blood cell count is between 4, and 11, cells per cubic millimetre 4. The number of white blood cells is sometimes used to identify an infection or to monitor the body's response to treatment.
There are five types of white blood cells: lymphocytes, monocytes, neutrophils, basophils, and eosinophils. Author: Healthwise Staff. Leukemia occurs when white blood cells rapidly produce and are not able to fight infections. Whether or not a person needs to alter their white blood cell count will depend on the diagnosis. If they have a medical condition that affects the number of white blood cells in their body, they should talk to a doctor about the goals for their white blood cell count, depending on their current treatment plan.
A person can lower their white blood cell count by taking medications such as hydroxyurea or undergoing leukapheresis, which is a procedure that uses a machine to filter the blood. This may help prevent infections.
A person can also take colony-stimulating factors. These may help prevent infection and increase the number of white blood cells in the body. There are different types of white blood cell, and each has a specific function in the body. Certain conditions can affect the number of white blood cells in the body, causing them to be too high or too low.
The immune system defends our body against invaders, such as viruses, bacteria, and foreign bodies. The white blood cells are a key component. Leukopenia is a condition where a person has a reduced number of white blood cells and an increased risk of infection. Learn more. Neutrophils are the most common form of white blood cell. They help the body respond to infection and heal damaged tissue.
Levels in the blood can…. White blood cells fight infection. If someone has too many white blood cells, they may have an underlying condition, such as an infection or cancer….
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