According to this quotation, without white blood cells, also known as leukocytes, we would not be able to survive. White blood cells are our body's number one defense against infections. They help keep us clean from foreign bacteria that enter our bodies. Statistics show that there are five to ten thousand white blood cells per micro liter of blood, however this number will increase during an illness. White blood cells can differ in many ways, such as, size, shape and staining traits. There are five different kinds of white blood cells that fall into two separ

ate categories. One category is called, granular leukocytes, and the other is called agranular white cells.

There are three different types of granular leukocytes. Neutrophil is a phagocyte, produced in the bone marrow that ingests and destroys bacteria extremely fast. Neutrophil has a diameter, which is, about ten to twelve micrometers long. They make up about 60-70 percent of the total number of white blood cells in our body. Eosinphil is a type of white blood cell that secretes poisonous materials in order to kill parasites, allergies and phagocytosis of bacteria, which is when the cell takes in materials to eliminate them or move them from where they were. They make up about 2-4 percent of the total number of white blood cells in our body. These white blood cells are similar to Neutrophil because they attack bacteria by the immune system. This p

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