The significance of the cell cycle lies in its role in cell growth, division, and overall organism development. The cell cycle consists of several phases: interphase (encompassing G1, S, and G2 phases) and mitosis. Proper regulation of the cell cycle ensures that cells divide at the right time, providing growth and repair. Disruptions can lead to uncontrolled cell proliferation or genetic mutations, contributing to diseases such as cancer. Understanding the cell cycle helps researchers develop treatments and therapies for various conditions.