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Chapter 3: Cellular Structure and Function

Difficulty Level: At Grade Created by: CK-12

What is this incredible object? Would it surprise you to learn that it represents a human cell? The image represents a cell, similar to one that may be produced by a type of modern microscope called an electron microscope. Without this technology, we wouldn’t be able to see the structures inside cells. Cells may be small in size, but they are extremely important to life. Like all other living things, you are made of cells. Cells are the basis of life, and without cells, life as we know it would not exist. You will learn more about these amazing building blocks of life when you read this chapter.

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