The erythrocytes of certain individuals possess the capacity to undergo reversible changes in shape in response to changes in the partial pressure of oxygen. When the oxygen pressure is lowered, these cells change their forms from the normal biconcave disk to crescent, holly wreath, and other forms. This process is known as sickling. What is Sickle Cell Anemia? It is a blood disorder that affects hemoglobin, red blood cells with normal hemoglobin move easily through …showed first 75 words of 833 total…

…showed last 75 words of 833 total…because of constant modern advances in medical technology, although modern advances have still not cured certain diseases, I believe that our evolution as human beings will also lend a hand in our treatment of diseases such as this. Sources: http://www.scinfo.org -The Sickle Cell Information Center http://www.kidshealth.org - Sickle Cell Anemia http://www.nature.com/nature/archive/index.html - March 20, 2005 issue of Nature http://www.medicinenet.com - MedicineNet