An increase in the numbers of red blood cells that makes the blood too viscous is

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Polycythemia is a condition where there is an increase in the numbers of red blood cells, which can make the blood viscous and increase the risk of blood clots. Hemorrhagic anemia is a condition where there is a decrease in the number of red blood cells due to bleeding, hemolytic anemia is a condition where the body destroys red blood cells too quickly, and pernicious anemia is a type of anemia caused by a deficiency of vitamin B12.

An Increase in the Numbers of Red Blood Cells That