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what do neutrophils do?

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Neutrophils are a type of white blood cells and are (like all white blood cells) a part of our immune system and have a primary role in defending us against bacterial infection. They are made in the bone marrow and travel around through the bloodstream.

When an infection occurs, these cells leave the blood vessels and reach the infected tissue to fight the infection i.e to attack the foreign substance. Neutrophils are white blood cells that foreign bodies usually ran into first.
They work by eating the foreign cells. They don’t live long. Some scientists think that is because they damage the host tissues as well, and the reason of their short life is to prevent this from happening.
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Hello,

as mayo said, neutrophils are part of the immune system, but they are also the most abundant immune cells that are present in the bloodstream. That means that they are also the first line of immune system defense, usually fighting all inflammatory or other dangers that affect the body. Sometimes, in certain auto immune conditions it's suspected that neutrophils might be responsible for attacking non-infected body cells.

They usually react the strongest to bacteria caused infections and they are usually majority of the cells found in pus. But any other injury causes them to respond and they do so in the matter of minutes after the injury happens.

Low neutrophil count is the cause of aplastic leukemia, among other conditions.
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