Osmosis In Patients

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In hospitals patients sometimes receive fluids by intravenous injection. Doctors choose a salt solution and never plain water to inject into humans. You know that blood is composed mainly of red blood cells. Use your knowledge of osmosis to explain why doctors make this choice?

Osmosis is the diffusion of water across a selectively permeable membrane from an area of higher water concentration to an area of lower water concentration.
Doctors make this choice because the salt e.g. IV drips is about same as what’s in the blood stream. They do this because it helps to prevent the blood to go thinner and/or weaker. The IV drips particles start to go around the the body balancing it out for an equal rate of water and oxygen

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