Cells

This course is a part of High school biology, a 9-course Topic series from Khan Academy.

You, my friend, are made up of cells. Lots and lots of them. Jump in to learn more about prokaryotic and eukaryotic cells and the complex and beautiful structures inside them.

This course contains 6 segments:

Introduction to cells

Start your cellular journey with some history and some microscopy! We'll learn more about how cells were discovered, how they can be observed, and how big they are in comparison to other very small things.

Basic cell structures

We'll learn about the complex and beautiful structures you can find inside all cells, whether they come from a plant, human, or even a bacterium.

The cell membrane

Learn about the amazing and versatile barrier that surrounds all of your cells: the cell membrane!

Eukaryotic cell structures

Join us on a voyage through some of the specialized compartments and structures of eukaryotic cells. From the rolling folds of the endoplasmic reticulum to the majestic fibers of the microtubule cytoskeleton, it's a trip you won't regret!

Prokaryotes and eukaryotes

What's the difference between you and a bacterium? Quite a lot of things! At the cellular level, some of the key differences include a cell nucleus and membrane-bound organelles, which you have (and the bacterium lacks). Here, we'll look in detail at the differences between prokaryotes and eukaryotes.

Plant vs animal cells

What's the difference between you and a tree? At the cellular level, you actually share many features include a cell nucleus and membrane-bound organelles. In this lesson, we'll look in detail at the similarities and differences between plant and animal cells.