Plasma

Straw-coloured fluid part of blood and lymph that contains water, electrolytes (e.g. sodium and potassium), glucose, fats, and proteins, and in which red cells (erythrocytes), white cells (leukocytes) and platelets are suspended. In addition to carrying the cellular elements, plasma helps maintain the fluid-electrolyte and the acid-base balances of the body and helps transport wastes.