We have to maintain that mean arterial blood pressure to ensure that all our bodies' tissues are being perfused with blood, therefore oxygen and nutrients. So it's very important that we regulate this pressure system. We'll get into there. But then we had to kind of go off and define what pulse pressure was. Oh, yeah. Okay. The take-home point is we have to maintain the mean arterialBlood Pressure (APP) for a long period of time before any treatment can be started. And so these receptors are measuring pressure. Yep. Well, in this case, we'll just go with pressure. Because they measure both pressure and chemicals. They have both barore