Which is the numerous type of blood cell

Cancer of the blood. Cancers including leukemia and lymphoma can cause uncontrolled growth of an abnormal type of blood cell in the bone marrow. This results in a greatly increased risk for infection or serious bleeding. Myeloproliferative disorder. This disorder refers to various conditions that trigger the excessive production of immature blood cells.

This can result in an unhealthy balance of all types of blood cells in the bone marrow and too many or too few white blood cells in the blood. Some medicines can raise or lower the body's white blood cell count. Conditions such as extreme physical stress caused by an injury or emotional stress can also trigger high white blood cell levels. So can inflammation, labor or the end of pregnancy, smoking, or even extreme exercise.

Search Encyclopedia. What Are White Blood Cells? Functions Functions in allergic reactions. Secrete anticoagulants and antibodies that have function against hypersensitivity reactions in the bloodstream. Basophils contain histamine, which dilates the vessels to bring more immune cells to the area of injury.

Secrete heparin which is an anticoagulant that promotes mobility of other WBCs by preventing clotting. Functions T lymphocytes T cells are responsible for cell-mediated immunity.

B lymphocytes are responsible for humoral immunity or antibody production. They can recognize and have a memory of invading bacteria and viruses. Function in destroying cancer cells. They present antigens to activate other cells of the immune system.

Monocytes Agranulocytes Largest of the types of white blood cells Kidney shaped nucleus present. Accounts for 5. Functions Enters the tissue, where they become larger and turn into macrophages. Destroy old, damaged and dead cells in the body. Platelets Thrombocytes Nucleus Absent. Do not reproduce. Platelets thrombocytes are small cell fragments that plug damage blood vessel walls and are involved in the formation of blood clots. White blood cells leukocytes perform their functions in tissues and use the circulatory system to reach their destination.

Granulocytes have a multilobed nucleus and contain specific granules in their cytoplasm. They are divided into three groups neutrophils, eosinophils, and basophils according to the staining properties of their specific granules.

Phagocytic cells that engulf and kill microbes bacteria, fungi, and protozoa. They are involved in many inflammatory processes, including parasitic infections, allergic diseases, and asthma. However, while the lack of a nucleus makes a red blood cell more flexible, it also limits the life of the cell as it travels through the smallest blood vessels, damaging the cell's membranes and depleting its energy supplies.

The red blood cell survives on average only days. Red cells contain a special protein called hemoglobin, which helps carry oxygen from the lungs to the rest of the body and then returns carbon dioxide from the body to the lungs so it can be exhaled.

Blood appears red because of the large number of red blood cells, which get their color from the hemoglobin. The percentage of whole blood volume that is made up of red blood cells is called the hematocrit and is a common measure of red blood cell levels. 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. Transfusion of neutrophils is generally not effective since they do not remain in the body for very long.

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. B lymphocytes make antibodies, which are proteins that specifically target bacteria, viruses, and other foreign materials.

Unlike red and white blood cells, platelets are not actually cells but rather small fragments of cells. Platelets help the blood clotting process or coagulation by gathering at the site of an injury, sticking to the lining of the injured blood vessel, and forming a platform on which blood coagulation can occur.