Why historic for intravenous fluids to be of like solute concentration as human blood?
Fluids that are the same solute concentration as human blood are call isotonic. The reason you want this is so that cell in your body won’t lyse (or break). If your solution going surrounded by has too much solute it will draw dampen out of the cells through osmosis, visa versa, if you enjoy pure water going into your system than the sea will rush into the cells cause the cells to expand and possibly burst. That is why everyday saline which is 0.9% NaCL, because that is how briny your blood is. There will be less disturbance to your system.
