# Cell structure

**In this chapter, you will learn to:**

* Describe why cells are considered the fundamental units of life.
* Apply appropriate measurement units used in microscopy.
* Identify common cell structures visible under a light microscope and summarize their form and function.
* Compare the main structural differences between animal and plant cells.
* Operate a light microscope and prepare temporary slides to observe cells.
* Identify, sketch, and measure cell components from temporary slides and micrographs.
* Calculate image magnifications and determine actual specimen sizes from drawings or micrographs.
* Explain how electron microscopes are used to study cells, focusing on their higher resolution compared to light microscopes.
* Identify common cell structures seen with an electron microscope and describe their roles.
* Provide a brief overview of ATP’s function within cells.
* Describe bacterial cell structure and contrast prokaryotic cells with eukaryotic cells.
* Explain the structure of viruses.