Hurrah, that brings us to the end of the module! We began the module by wondering how the human body grows. We wanted to know how our height keeps increasing for the first twenty or so years of our lives.
We can now answer that question. We know that our bodies are made up of different kinds of cells. As time goes on, these cells keep dividing, and our bodies grow.
So, the increase in our height is nothing but an increase in the number of cells in our body. For a building to grow, we need to add more material. For us to grow, our body itself creates the material needed!