Question: how does the cells in a baby form from birth?

Ian van der Linde answered on 21 Jun 2011:

My understanding is this. As you know, every animal cell contains DNA, the blueprint for building a human being. When a body grows, the cells divide and different parts of the DNA get activated in each cell because cells can sense where they are in the developing body by their chemical environment. The DNA that gets activated specialises the cell for the particular position it will end up at in the fully-formed body, whether destined to be part of a kidney, eye, brain or kneecap! It’s an amazingly complicated process, but it usually seems to work rather well!!