Your blood coagulates with blood platelets to stop the bleeding.
Veins, Arteries (Capillaries are also blood vessels, but the main job is gas exchange).
Blood vessels that are larger can be felt, like arteries and veins, though it is easier to feel arteries because they have a pulse.
First it should be clear that blood can't clot only in the presence of a anticoagulant or/and in the absence of clotting factors. if anticoagulant is not there in the vicinity of blood then blood...
your arteries, not your veins.