Where does diffusion occur in plant and animal cells?

Diffusion occurs across the cell membrane of plant and animal cells. Diffusion is a mode of cellular transport that moves ions, water, and other small nutrients into and out of the cell.

Diffusion is a form of passive transport, which implies that it does not require the use of energy. Diffusion is defined as the movement of particles from an area of higher concentration to an area of lower concentration. In other words, particles experiencing diffusion move down their concentration gradient.

This movement is the result of the random kinetic motion of the particles within a substance. Kinetic energy is the energy of motion. All particles are in constant, random motion. It is this motion that results in the diffusion of particles from an area of high concentration to low concentration until a state of equilibrium has been reached.