Arterial: most serious from arteries. Bright Red and spurting.
Venous: comes from the veins. Dark red and flowing.
Capillary: least serious from capillaries. Mixture of reds and oozing.
  Apply direct pressure, Raise and support the injured limb, cover wound with a sterile dressing, treat for shock and send to hospital. A place which pressure can be placed to stop blood flowing to the entire limb e.g. arm. This can be used if direct pressure does not work. This is where an artery can be pressed against a bone to stop the blood flow beyond this point. They can be found in your arm and at the top of your leg. You can check circulation of a casualty by pressing their nail so it turns white. It should return back to red by the time you say capillary refill.