Thank you to "THE FRANKLIN INSTITUTE", for the use of this material that comes straight from thsir web pages,
"The Heart: An Online Exploration" resource: also the links on this page.

It might seem like plasma is less important than the blood cells it carries. But that would be like saying that the stream is less important than the fish that swims in it. You can't have one with out the other.

Be sides water, plasma also contains dissolved salts and minerals like calcium, sodium, magnesium, and potassium. Microbe - fighting antibodies travel to the battle field so disease by hitching a ride in the plasma.

With out plasma, the life - giving blood cells would be left floundering with out transportation. Never underestimate the importance of plasma.