| OSMOSIS | DIFFUSION |
| Only the solvent (Fluid) part moves. | All the particles (gas,liquid and solid) can move. |
| The movement is only in one direction.i.e, from a less concentrated solution to a more concentrated solution. | The movements occurs in all directions or from higher concentration to lower concentration. |
| It requires a semi-permeable membrane because it is porous. | It don't require a semi-permeable membrane. |
| It is of two types: endosmosis (movement of water inside) and exosmosis (movement of water outside). | It includes dialysis (diffusion of protein particles etc) |
| For example: swelling up raisins when placed in fresh water, roots of plants taking up water from the soil. | For example: Diffusion of perfume particles in the whole room, color dye diffusion in water. |
