ELI5: Explain Like I'm 5

Cellular differentiation

Cellular differentiation is when cells in our body become different types of cells. We have many different kinds of cells in our body, like brain cells, skin cells, and heart cells. Each type of cell looks a bit different, and they do different things. Cellular differentiation is what makes each of our cells unique and important, so that our bodies can work the way they're supposed to.