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The Cell — Life's Smallest Unit

Cell Basics — What Is a Cell?

What do cells have in common?

Animal vs Plant Cells — Spot the Differences

Which structure is found ONLY in plant cells?

The Cell Membrane — The Gatekeeper

What is the main job of the cell membrane?

Introduces what cells are, how animal and plant cells differ, and how the cell membrane controls what enters and exits. Sets the foundation for all modules ahead.

Every living thing is made of cells. In this module you'll discover what cells are, why scientists study them, and how the cell membrane acts as a gatekeeper for everything that enters and exits.

What's Inside a Cell?

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