The reason fluid leaves at the arterial end of the capillary bed and returns to the venous end of the capillary bed is the difference in hydrostatic pressure.
If you are looking for the right car paint for your vehicle, then one way to find the match is to look at the VIN number and find out the correct car paint codes from this detail.
Just locate your car in the appropriate table and look at where the color code should be on your car. Some cars have always put the color code in one location. Other car manufacturers place the code in odd places and you may have to check several locations. You are looking for a plate, sticker, decal or stamped into the body somewhere. Just look at the diagrams closely and you will find it! Consider finding your color code like an Easter Egg Hunt!