![]() In addition, the consequences of the fluid drop-like behaviour of the red cells during blood flow in vivo and in vitro are given an appendix contains an outline of the mechanics of the red cell membrane as a two dimensional elastoviscous fluid film with suspended proteins. Cytological causes, microrheological details of continuous red cell deformation by deformation orientation, membrane tanktreading, and cytoplasmic eddy flow are described. The present review presents theoretical details of the flow and deformation of fluids, of suspensions of particles, and of emulsions of fluid droplets immersed in another immiscible fluid. C 1494, available through the Institute for the Scientific Film, NonnenstGöttingen, FRG. The specific details of their motion in shear fields have been demonstrated in a scientific film: 'Blood fluidity as a consequence of erythrocyte fluidity', film No. The unique biology of mammalian red blood cells stems from the fact that they behave akin to fluid droplets. In addition to the specific functions of intracellular haemoglobin concentration, their flow behaviour as non-nucleated cell fragments is central to their role in taking up, transporting and releasing reversibly bound oxygen. Source: National Heart, Lung, and Blood Institute, National Institutes of Health.Red blood cells as transport cells for oxygen can only be understood by appreciating their specialist functions. Treatment and outlook for secondary thrombocytosis depend on its underlying cause. Most people who have primary thrombocythemia will live a normal lifespan. Other people who have this condition may need medicines or procedures to treat it. People who have primary thrombocythemia with no signs or symptoms don't need treatment, as long as the condition remains stable. These symptoms are more likely to occur in people who have primary thrombocythemia. Rarely, serious or life-threatening symptoms can develop, such as blood clots and bleeding. Often, a high platelet count doesn't cause signs or symptoms. Secondary thrombocytosis is more common than primary thrombocythemia. This condition often is called secondary or reactive thrombocytosis. When another disease or condition causes a high platelet count, the term "thrombocytosis" is preferred. With primary thrombocythemia, a high platelet count may occur alone or with other blood cell disorders. What causes the bone marrow to make too many platelets often isn't known. It contains stem cells that develop into red blood cells, white blood cells, and platelets. Bone marrow is the sponge-like tissue inside the bones. This condition occurs if faulty cells in the bone marrow make too many platelets. The condition sometimes is called primary or essential thrombocythemia. The term "thrombocythemia" is preferred when the cause of a high platelet count isn't known. Platelets also are called thrombocytes (THROM-bo-sites) because a blood clot also is called a thrombus.Ī normal platelet count ranges from 150,000 to 450,000 platelets per microliter of blood. Clotting helps stop any bleeding that may occur if a blood vessel is damaged. Platelets travel through your blood vessels and stick together (clot). They're made in your bone marrow along with other kinds of blood cells. The formed elements are heavy and settle to the bottom, they are not all the same. In this test, a tube of whole blood is spun in a centrifuge and the formed elements separate from the plasma. Thrombocythemia (THROM-bo-si-THE-me-ah) and thrombocytosis (THROM-bo-si-TO-sis) are conditions in which your blood has a higher than normal number of platelets (PLATE-lets). Blood test that measures the ratio of the volume of red blood cells to the total volume of blood.
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