What is the Difference Between Similar But Different Things, Terms, and Objects

What is the Difference between Diffusion, Dialysis, and Osmosis

Diffusion, dialysis and osmosis are the three processes found in nature and performed in laboratories artificially. Not as perfect as nature does, laboratories too have discovered the ways to perform these tasks. The three processes are very helpful in many medical treatments as well. Like, dialysis is the process which is helpful to the kidney patients.