When your red blood cells can't carry enough oxygen to other parts of your body, you're said to have anemia. It can occur because you have fewer red blood cells than normal; you have a lack of oxygen-transporting hemoglobin (HEE-moe-glow-bin) in your blood; or your red cells have decreased in volume.
Blood donation requirements
Requirements for blood donors vary somewhat from one state to another, but there are general guidelines established by the Red Cross. In most instances donors should be 17 or older, weigh at least 110 pounds, and be in good health.
Donating blood before surgery
It's becoming increasingly common to donate your own blood to be used during surgery, when your operation is scheduled far enough in advance. This method is known as autologous (aw-TOL-oh-guss) donation.
Sickle-cell anemia
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