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What is Anemia?
Sickle cell anemia is an inherited blood disorder characterized primarily
by chronic anemia and periodic episodes of pain. The underlying problem
involves hemoglobin, a component of red blood cells. Hemoglobin molecules
in each red blood cell carry oxygen from the lungs to body organs
and tissues and bring carbon dioxide back to the lungs. In sickle
cell anemia, the hemoglobin is defective. After hemoglobin molecules
give up their oxygen, some may cluster together and form long, rod-like
structures. These structures cause red blood cells to become stiff
and assume a sickle shape. Unlike normal red cells, which are usually
smooth and donut-shaped, sickled red cells cannot squeeze through
small blood vessels. Instead, they stack up and cause blockages that
deprive organs and tissues of oxygen-carrying blood. This process
produces periodic episodes of pain and ultimately can damage tissues
and vital organs and lead to other serious medical problems. Normal
red blood cells live about 120 days in the bloodstream, but sickled
red cells die after about 10 to 20 days. Because they cannot be replaced
fast enough, the blood is chronically short of red blood cells, a
condition called anemia.
Click Here For More Anemia Information(http://www.ornl.gov/TechResources/Human_Genome/posters/chromosome/sca.html)
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