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Line 1: − {{merge|sickle cell disease}} − '''Sickle cell anemia''' is a serious condition in which the red [[blood]] cells can become sickle-shaped (that is, shaped like a "C"). − − Normal red [[blood]] cells are smooth and round like a doughnut without a hole. They move easily through [[blood vessel]]s to carry oxygen to all parts of the body. Sickle-shaped cells don't move easily through blood. They're stiff and sticky and tend to form clumps and get stuck in blood vessels. − − The clumps of sickle cells block blood flow in the blood vessels that lead to the limbs and organs. Blocked blood vessels can cause pain, serious infections, and organ damage. − − == Sources == − − * [http://www.nhlbi.nih.gov/health/dci/Browse/Blood.html NIH Glossary] − [[Category:Medicine]]
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