What Do White Blood Cells Do?
Reviewed: Dr. Gromatzky
3. Production
White blood cells are made in our own bodies. To be more precise, they are manufactured in the bone marrow. From the bone marrow they are then released into our blood where they will be on the hunt for anything that should not be there. Others will take up a position at stations that evolved to filter the blood of pathogens.
White blood cells have a life span of 13-20 days. Some will expire almost straight away if/when they are called into action to deal with an existing threat. As such, the body needs to be constantly replacing those that have died so new white blood cells are being constantly produced.
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