 The human body is made up of 37 trillion cells and what we're trying to do is to profile and map the characteristics of each of these individual cells. Once you know how we function, what keeps us healthy, we'll be able to understand how things go wrong and prevent disease, design new treatments but also how to build organs. What you're seeing here is skin as an organ that has been grown from stem cells. The way we've learned how to grow this skin has been informed by our findings from the human cell atlas and what you can now do with this type of model is to use it for skin transplant for example. You can also use it to understand how skin heals and how skin responds to environmental challenges.