Sickle cell disease is a disorder of the blood and, consequently, the circulatory system. Sickle cell affects what is known as hemoglobin in the red blood cell. Hemoglobin’s function is to carry oxygen within the cell and transport to where it is needed. But in an affected sickle cell, the red blood cell is misshapen, appearing in a crescent moon or sickle shape. A normal red blood cell is pliant and round, which enables it to easily flow through the bloodstream, whereas a sickle cell is rigid and, due to its shape, causes a clot to form in a blood vessel.

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