1. The osmotic pressure of the blood cells is approximately equal to 7 atm at 37°C.
2. The intravenous injections should have saine osmotic pressure as that of the blood (isotonic vith blood).
3. If the intravenous solutions are too dilute that is hypotonie, the solvent from outside of the cells flow into the cell to normalise the osmotic pressure and this process is called haernolysis causes the cells to burst.
4. On the other hand, if the solution is too concentrated, that is hypertonic. the solvent molecules will flow out of the cells,which causes the cells to shrink and die.
5. For this reason, the intravenous fluids are prepared such that they are isotonic to blood (0.9% mass/volume sodium chloride solution).
