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WHAT IS THE WORK OF THE BLOOD?
Unit 4 Lesson 5
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.
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.
• U-4 L-5 / Human Blood: Welcome
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