Diffusion vs. Osmosis: The Core Difference
Diffusion is the net movement of any particles (atoms, ions, or molecules) from an area of higher concentration to an area of lower concentration. Osmosis is a specific type of diffusion; it is the movement of water molecules across a selectively permeable membrane from an area of higher water concentration to one of lower water concentration.
Key Distinctions Explained
The main difference is that osmosis requires a semipermeable membrane and specifically involves the movement of water. Diffusion, on the other hand, does not require a membrane and can involve any type of particle. In short, all osmosis is diffusion, but not all diffusion is osmosis.