Biological transport is the process by which molecules, ions, and other substances are transported across cell membranes and within cells in living organisms. This transport is essential for various cellular processes, including nutrient uptake, waste removal, signal transduction, and maintaining cellular homeostasis. Biological transport mechanisms include passive diffusion, active transport, facilitated diffusion, endocytosis, exocytosis, and vesicular transport. Understanding biological transport is crucial for studying physiological processes, disease mechanisms, drug delivery, and cellular communication.