Blood is separated into two main parts. fifty percent of the blood consists of platelets white cells red cells plasma

Fifty percent of the blood consists of plasma

Blood is a special body fluid that provides the body with oxygen, nutrition, temperature control and waste removal.  Blood is composed of about 55 percent plasma. Plasma is the liquid part of blood which contains red blood cells, white blood cells, and platelets. Plasma consists mostly of water that has dissolved salts and proteins (albumin, antibodies) that perform functions such as helping blood to clot, defending the body against pathogens and movement of substances through the blood.