Cell transport is the process by which molecules and other substances are moved into, out of, and within cells. This transportation is essential for maintaining cellular functions such as nutrient uptake, waste elimination, and communication between cells. There are two main types of cell transport: passive transport, which occurs without the need for energy input, and active transport, which requires energy to move substances against their concentration gradient. Cell transport plays a crucial role in various physiological processes and is tightly regulated to ensure cellular homeostasis.