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Have You Ever Been Yellow?

Most of your blood isn't red

(HealthDayNews) -- Did you know that most of your blood is actually yellow?

Plasma, which makes up 55 percent of the total volume of your blood, is the color of straw, says the Doubleday and Co. book, Amazing Facts About Your Body. However, it is literally overshadowed by the color of 25 trillion red cells.

Besides red cells, the other 45 percent of human blood includes 20 billion white cells and 1.25 billion platelets.

In terms of chemical composition, the substance that most resembles human blood is sea water.

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