Intact cpillaries near an injury dialate, leaking plasma, blood cells, and what cause blood to clot

amion acids
antibodies
collagenases
clotting proteins

I was thinking clotting proteins?

You are thinking correctly. This protein is called fibrinogen and is found in an inactive form in blood platelets. When there is a wound, a complex series of reactions happens called a 'cascade', which results in fibrinogen being activated to fibrin, which is a tough, long protein that begins to form a web around a wound. As with a spider's web, each strand of fibrin is thin but tough and they weave across a wound forming a dam that traps red and white blood cells, thereby forming a clot. The injured tissue releases an enzyme that begins this cascade, and there are many different enzymes, all proteins, that must interact before a clot begins to form. Someone suffering from hemophelia lacks one of these enzymes so blood clots form very, very slowly.