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Cancer Essay

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Chapter.1
INTRODUCTION
1. Introduction:
Leukemia is cancer of the blood cells. To understand leukemia, it is helpful to know about normal blood cells and what happens to them when leukemia develops. The blood is made up of fluid called plasma and three types of cells, each with special functions: * White Blood Cells (also called WBCs or leukocytes) help the body fight infections and other diseases. * Red Blood Cells (also called RBCs or erythrocytes) carry oxygen from the lungs to the body's tissues and take carbon dioxide from the tissues back to the lungs. The red blood cells give blood its color. * Platelets (also called thrombocytes) help form blood clots that control bleeding. Blood cells are formed in the bone marrow – the soft, spongy center of bones. New (immature) blood cells are called blasts. Some blasts stay in the marrow to mature. Some travel to other parts of the body to mature. Normall...

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