Total "osmolarity" of blood? Curious about water weight vs. biological I've seen plasma osmolality described on wikipedia: http://en.wikipedia.org/wiki/Plasma_osmolality This looks at the concentration of electrolytes in the "plasma solvent". However, plasma is the liquid of the blood, with cells removed. I'm curious about the concentration of blood cells AND electrolytes in the "plasma solvent". Has anyone seen information on this?