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A cell is the building block of life. All living organisms are made up of cells. The simplest organisms, like bacteria only have one cell, while larger creatures like trees and animals are made up of millions of cells.
Different types of cell in your body do different things. For example, there are special cells that make your bones and your brain that aren't very much alike, but are both types of cells.
Different types of cell in your body do different things. For example, there are special cells that make your bones and your brain that aren't very much alike, but are both types of cells.