Cell growth refers to the process by which a cell increases in size and mass. This growth is essential for the development and maintenance of living organisms. Cells grow by taking in nutrients and converting them into energy, which supports various cellular functions. During cell growth, cells also prepare for division, a process known as mitosis. This involves replicating their DNA and increasing the number of organelles. Proper cell growth is crucial for tissue repair, development, and overall health in organisms, including humans and plants.