which is a type of white blood cell?
White blood cells protect the body from infection. They are much fewer in number than red blood cells, accounting for about 1 percent of your blood. The most common type of white blood cell is the neutrophil, which is the immediate response cell and accounts for 55 to 70 percent of the total white blood cell count. Each neutrophil lives less than a day, so your bone marrow must constantly make new neutrophils to maintain protection against infection.
The other major type of white blood cell is a lymphocyte. There are two main populations of these cells. T lymphocytes help regulate the function of other immune cells and directly attack various infected cells and tumors.
There are five different types of white blood cells, also called leukocytes, found in the human bodies. White blood cells all help to defend the body from foreign particles in some way. All white blood cells are produced in red bone marrow, with the special type lymphocytes also being formed in lymphatic tissue.