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: '''Red blood cells''' carry [[oxygen]] in their [[haemoglobin]] [[molecule]]s.
: '''Red blood cells''' are made in the [[Bone Marrow|bone marrow]].
: When '''red blood cells''' die they are broken into small pieces called [[plateletsplatelet]] s which help the [[blood]] clot when there is an open wound.
: If a person suffers from [[Sickle Cell Anemia]] the '''red blood cells''' are sickle shaped so they can become stuck in [[capillaries]].