Passive transport

Passive transport is the process by which substances move across a cell’s membrane without using energy. It relies on natural movement from areas of higher concentration to lower concentration, allowing molecules like oxygen and carbon dioxide to diffuse in and out of cells efficiently. This process helps maintain the cell’s balance and is essential for normal cellular function. Since it doesn’t require energy, passive transport occurs spontaneously, driven by concentration differences, ensuring cells receive necessary substances while waste products exit.