Lesson 1 of 9

What is a cell?

Goal: Know that all living things are made of cells.

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A magnifying glass over a leaf, showing the cells it is made of

Every living thing is made of cells.

  • A cell is the smallest building block of a living thing. Think of bricks in a house.
  • Cells are tiny. You need a microscope to see most of them.
  • You are made of trillions of cells. Some living things are just one.
UnicellularMade of one cell
MulticellularMade of many cells

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Key words in this lesson

Cell Smallest building block of a living thing

Unicellular Made of one cell

Multicellular Made of many cells

For teachers: AQA 3.8.2 · Pearson Edexcel 2.5 in part · Cambridge 7Bs.01