Answer: A type of blood cell that is made in the bone marrow and found in the blood and lymph tissue. White blood cells are part of the body's immune system. Because some white blood cells called neutrophils have a short life less than a day, your bone marrow is always making them. White blood cells are part of the body's immune system. They help the body fight infection and other diseases.
Explanation: They are made by the bone marrow. there purpose is to help fight off sickness in the bodys system.