Question: have you figured out HOW these cells form to make a human being?

Jason King answered on 11 Mar 2013:

That is an excellent question, and one that has kept lots of very clever people busy for a very long time. All the cells in your body have the same DNA and therefore all the information to be any kind of cell. Why some cells turn into brain cells, and others in muscle cells for example is really important to both keep us healthy and make our bodies form in the first place.

the key to making a body with lots of different parts is to get the cells talking to each other. They give off lots of different signals that change the behaviour of their neighbours, and make them specialise into different types of cells. By doing this throughout the body, using different signals that spread in different ways you can basically split it into different sections and work out where to put an arm, or a head. This is the basic idea though, but we still don’t really know all the details.