What is diffusion?

Diffusion is the process in which particles move from a region of higher concentration to a region of lower concentration until they are evenly distributed.

This movement occurs naturally due to the random motion of particles and does not require energy.

Diffusion is important in living organisms for processes such as the exchange of gases during respiration. For example, oxygen diffuses from the lungs into the blood, while carbon dioxide diffuses from the blood into the lungs.

In plants, diffusion helps in the exchange of gases through stomata.

Diffusion is a passive transport process that helps maintain balance in biological systems.