What is osmosis: Osmosis works on a

Osmosis works on a similar principle whilst active transport is essentially the opposite. An example of a process that uses diffusion is the transfer of oxygen from the lungs into the blood. The diagram below illustrates the diffusion process: Osmosis Osmosis is very similar to diffusion and works on the same principles. Diffusion, osmosis and active transport are all transport processes. Diffusion refers to the movement of any molecules/ions apart from water whereas osmosis refers to the transport of only water. What is Osmosis ? The one definition of osmosis is 'The movement of water from a high concentration to a low concentration, down it's concentration gradient, across a partially permible membrane, until osmotic pressue is equal'. What is osmosis and why does it occur? Osmosis is the movement of water molecules from an area of high water concentration to an area of low water concentration through a partially/selectively permeable membrane (PPM).