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.
Before you buy a used car, you can check the VIN number in two ways: using page https://historiapojazdu.gov.pl/, you can find free reports, from the Central Register of Vehicles. In addition to the VIN you have to know the car registration number and date of first registration.