We've found out about what we are made of, but where do all these things come from?
Well the answer, of course, is our food.
What things do
What do all these things have in common? That's right, they came from living things - animals or plants, so the things you are eating are the things you are made up of.
You might also have noticed that our list of things that your cells are made of also lists all the things that you need to have in a balanced diet!