White blood cells are the major large blood cells and can cause one part of the body to protrude and drag the rest. They are the "soldiers" of the blood, attacking bacteria and various unknown invaders to the body. When your body is in trouble and a particular area is under attack, white blood cells step in to help destroy the harmful substance and prevent disease (What are White Blood Cells). The white blood cells are ready to penetrate the small blood vessels, letting the blood enter the different tissues that are attacked by foreign invaders. Say no to plagiarism. Get a tailor-made essay on "Why Violent Video Games Shouldn't Be Banned"? Get an original essay Leukopenia, a decrease in the number of white blood cells to less than 4,000 cells per microliter of blood, often makes individuals very at risk for infections. Leukocytosis, which increases in the white blood cell range to over 11,000 cells per microliter of blood, is usually caused by the body's normal response to help attack an infection or by certain medications such as corticosteroids. However, an increase in the range of white blood cells is also caused by cancers of the bone marrow (such as leukemia) or by the release of immature or irregular white blood cells from the bone marrow into the blood. Other disorders may involve some types together or all five types of white blood cells (Mary Territo, MD). Neutrophils make up the majority of whole white blood cells in the average person's blood. Of all white blood cells, typically 50-70% neutrophils are present. A mature neutrophil includes a segmental nucleus and is twice the size of a red blood cell. A divided nucleus means that 2 to 5 segments (akalobes) of the nucleus can be seen in a cell. Eosinophils are granulocytes, so they also have granules! However, their pellets are completely different from neutrophil granules. The suffix "Phil" means "to love". Eosin may be a form of acid red dye. Therefore, eosinophils love the dye eosin. They grab a lot of eosin dye once dyed, creating their large red granules. The granules of an eosinophil usually cover the nucleus, but you will usually see that the nucleus is segmented. Eosinophils are not as familiar with blood as neutrophils. They usually represent less than 3% of an individual's total white blood cells. Basophils, the last and least important (in number) of the granulocytes. They are present together in one hundred or less of an individual's white blood cells. Similar to eosinophils, basophils love to dye. But basophils love the "basic blue" dye. Therefore, their large granules are a deep blue-purple color. Their nucleus is also segmented. However, it is difficult to verify this in the presence of these intense granules. Please note: this is just a sample. Get a custom paper from our expert writers now. Get a Custom Assay Lymphocytes and monocytes belong to the mononuclear cell group. This suggests that their nucleus is whole. Lymphocytes make up the majority of cells within the nodes of the liquid body substance. There are almost as many lymphocytes as neutrophils in the blood. Lymphocytes are special because they will become "memory cells". Once doctors observe that someone is "immune," they touch on the ability of that person's lymphocytes to remember a distant invader. Once someone is exposed to a new infectious agent, some of their lymphocytes create antibodies against it. The rest of the lymphocytes detect that infectious agent and find that the system works faster whenever someone is exposed to it, infectious agent. Young children have many lymphocytes compared to adults.