WHAT IS THE WORK OF THE BLOOD?

In this, another example of a two-page lesson, middle school students learn about the basic components of blood (plasma, and the three cells - red, white, platelets). Clear illustrations assist students in understanding the important concept of diffusion.

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The opening story features Dr. Charles Drew, an African American physician who developed the method and drying and reconstituting blood plasma - a process that saved countless lives during World War II.

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