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The Structure of Cells

The Structure of Cells

Cells are often referred to as the “building blocks of life.” All living organisms contain these smallest units of life that can replicate independently.

Each cell, whether prokaryotic or eukarotic, contains a structural, functional and biological purpose. Discover more about the structure of cells.


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Author(s): Center for Educational Outreach
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The Structure of Cells

What Are Cells?

Cell Size

Relative Sizes of Organisms

Prokaryotic and Eukaryotic Cells

Prokaryotic Cell: Bacteria

Eukaryotic Cell: Animal

Plasma Membrane

The Nucleus

Rough Endoplasmic Reticulum


Smooth Endoplasmic Reticulum

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