What is one of the three proteins found in blood plasma, and what is its purpose?

What will be an ideal response?

Three proteins are found in blood plasma. The first, fibrinogen, is necessary for blood clotting. The second protein, albumin, is a product of the liver and helps to maintain the blood's osmotic pressure and volume. The third protein, globulin, is formed in the liver and also in the lymphatic system. These proteins help in the synthesis of antibodies, which fight infection. Globulin proteins called prothrombins help blood to coagulate.