 And then, of course, we have to feed the cells something. So we put them in a liquid medium that provides all the nutrients that these cells need to grow and divide. Lastly, the cells on the scaffold in the medium all grow within a bioreactor, which is kind of like a large stainless steel tank, looks a lot like brewing equipment and can be just as big as well. And the bioreactor really just provides that constant, stable environment that those cells need to flourish in.