[MUSIC] So in this unit we've looked at homeostasis, which I, I hope now you understand or appreciate is, is not so simple as just keeping blood pressure and heart rate within bounds. It's a really interesting function that we do. In that we bring all of ourselves, all of our brain abilities to do it, not just smooth muscle and cardiac muscle, but also voluntary muscle and thought processes. If we don't put on a coat, if I don't put on a coat, when I go out into a Chicago winter, things are not going to work well, as, as well as my brain could, can adapt. Without that kind of forethought, without that kind of cognitive in, input I cannot thermoregulate effectively. But I think that the most interesting thing about the, the brain is in contrast to something like the pancreas. The pancreas contributes majorly to homeostasis by pumping out insulin, but, the, the pancreas cannot anticipate things. It can't even anticipate when the meals are going to happen. It takes the brain to do that. And what's really amazing about the brain is that it can anticipate and make sure that we're going to stay on an even keel physiologically before there's ever any departure from normal. So we don't have to be like a room that gets too cold, and then the heat goes on. And then it gets too cold again, and the heat goes on. We don't have to depend on making an error, and then correcting it. We can correct things before they ever happen. We can prevent the errors from ever happening. And the only organ in the entire body that can do that is the brain. It's a beautiful thing. [MUSIC]