Plasma is the colorless liquid part of blood. Plasma holds blood cells but is not made from them.
Plasma, a crucial part of blood, can be donated for use in medical procedures, either from plasma donation or as part of a regular blood donation. Another meaning of plasma is in physical chemistry — a state of matter (in fact the most common state of matter) made from a gas that has lost its electrons from heat. This is where those big-screen plasma televisions get their name from.