Final answer:
Plasma is primarily made up of about 92 percent water. Proteins make up about 7 percent of the volume of plasma.
Step-by-step explanation:
Plasma is composed of about 92 percent water. The remaining percent consists of various substances, including proteins.
Plasma proteins make up about 7 percent of the volume of plasma. The three major groups of plasma proteins are albumin, globulins, and fibrinogen.