Diffusive transport in biological systems

Diffusive transport in biological systems is the process by which molecules move from areas of higher concentration to areas of lower concentration, driven by random molecular motion. This passive movement allows essential substances like oxygen, nutrients, and waste products to efficiently reach or leave cells without the need for energy input. Diffusion helps maintain the balance of chemicals within tissues and cells, supporting normal biological functions. It is fundamental for processes such as gas exchange in lungs and nutrient absorption in the intestines, ensuring that vital molecules reach where they are needed most.