Cell growth is the process by which a cell increases in size and mass. This growth is essential for the development and maintenance of all living organisms. Cells grow by taking in nutrients and energy, which they use to build new cellular components. As cells grow, they prepare for division, a process that allows them to reproduce and create new cells. When a cell reaches a certain size, it undergoes cell division, splitting into two new cells. This process is crucial for growth, repair, and reproduction in organisms. Proper regulation of cell growth and division is vital, as uncontrolled growth can lead to issues like cancer.