I'll help if you promise to use proper grammar and terminology please. (Makes researching an answer for you easier)
One process goes through a membrane (skin or film ) and the does not.
diffusion - traveling from a high concentration to a lower concentration
think spreading
perfume traveling throughout the air in a room
osmosis - diffusion through a semi-permeable membrane
think absorption
water being soaked up by a sponge - the WHOLE sponge gets wet, not just one part