But then we have a drop taking place between the arterials and our arteries right over here. And eventually when we get to the capillaries that ensures that the capillaries don't have a high pressure and have a low velocity of blood flow. Then we have the Venuels, the veins and our vena cava and then the cycle basically repeats. Now, this describes the diagram only for our systemic cardiovascular system. The pulmonary circulation looks very similar except the pressure within our pulmonary artery is smaller than the pressure within our order which is this one right here. Now, the way that we actually measure blood pressure inside our body is by first calculating our blood pressure within our aorter.