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Assuming you mean human red blood cells (RBC), there are several "special" things about RBCs. RBCs do not have a nucleus, and they have a distinct shape-biconcave disks. That means they are shaped sort of like a donut, but without an actual hole in the center, just indentations. Sickle-cell anemia, for example, is so named because the RBCs of people with sickle-cell anemia are shaped like sickles. These unusually shaped cells have a harder time moving through the capillaries and transporting oxygen.

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16y ago
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14y ago

They do not have a nucleus.

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Q: What are the characteristics of the RBC?
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