Blood proteins are essential components of blood that perform various functions in the body. They include albumin, which helps maintain blood volume and pressure, and globulins, which play a role in immune response. Another important group is fibrinogen, which is crucial for blood clotting. These proteins are produced mainly in the liver and are vital for transporting nutrients, hormones, and waste products. They also help regulate fluid balance and pH levels in the body. Abnormal levels of blood proteins can indicate health issues, making them important markers in medical diagnostics.