Plasma proteins are essential components of blood plasma, the liquid part of blood. They play crucial roles in various bodily functions, including maintaining osmotic pressure, transporting nutrients, hormones, and waste products, and supporting the immune system. The main types of plasma proteins include albumin, globulins, and fibrinogen. Albumin helps regulate blood volume and pressure, while globulins are involved in immune responses. Fibrinogen is vital for blood clotting, converting into fibrin to form clots. Overall, plasma proteins are vital for maintaining health and supporting numerous physiological processes in the body.