Now, as we increase the A to keep the Q the same, the V must decrease. And that's exactly why within the capillaries the velocity of blood flow is the lowest because the total cross sectional area of the capillaries is basically the greatest. So we see that within the aorta and the large and smaller arteries we have a high pressure. But then as we go into the arterials the resistance to flow increases, the velocity of the blood flow decreases and the pressure also drops. And that's to ensure that the capillaries don't break as a result of any high pressure and that the flu exchange, the nutrient exchange can take place within our capillaries. Now, the veins connect to our capillaries on the other side.