What is a white blood cell?

White blood cells are guardians of the body and serve as the backbone of the immune system. White blood cells are found throughout the body, blood and lymphatic system. White blood cells have a density of about 4-11 billion per liter of blood. The scientific name for white blood cell is leukocyte, which simply means "white cells". This color was first discovered when the blood was inserted into high -speed centrifuges and divided into its ingredients. In healthy individuals, white blood cells are about 1% of blood. In patients, this percentage increases significantly. The ratio of white blood cells in the blood can be used as a diagnosis of the disease.

There are several different types of white blood cells, all with finely variable functions. Some of the most common are neutrophils (65%), lymphocytes (25%), monocytes (6%), eosinophils (4%) and basophils (1%). White blood cells come from stem cells in the bone marrow. Scientists work on ways to use stem cells to mass production of white blood cells as you like that could be used for immunityTherapy.

neutrophils are the most common and first line of defense against bacterial and fungal infections. Hnes consists of a large number of dead neutrophils. Neutrophils, like most white blood cells, are involved in phagocytosis, ie consumption and digestion of bacteria or other foreign materials. Neutrophils can detect whether the cell is part of the body or a foreign control of molecules on its surface. Neutrophils act as suicidal bombers - they cannot complement the lysosomes used to digest microbes, so they simply die after killing several bacteria or mushrooms.

Lymphocytes are the second most common type of white blood cells. There are a number of different lymphocytes. Their functions include the production of the fighters - protein signs that help the body identify attackers - coordination of the immune system and destruction of body cells that have become contaminated with foreign material.