Since Linda does not have an idea as to what Plasma is, might as well tell her the basic definition that she can understand for she does not know what Plasma really is. Well maybe you can answer her question by the definition stated below:
Plasma is the liquid portion of the blood. It is not the plasma that most of us is really common with. It is not the four states of matter but rather the it is called a blood plasma and it contains antibodies and other proteins.