The cell cycle is the series of events that occur in cells as they grow and divide. It consists of two main stages: interphase and mitosis.

Interphase is the period of cell growth and preparation for cell division. It is divided into three phases: G1, S, and G2. During G1, the cell grows and carries out its normal functions. In S phase, DNA replication occurs, creating two identical copies of the cell's genetic material. In G2, the cell prepares for mitosis by synthesizing proteins and organelles needed for cell division.

Mitosis is the process of cell division that results in the formation of two identical daughter cells. It consists of four stages: prophase, metaphase, anaphase, and telophase. During prophase, chromatin condenses into visible chromosomes and the nuclear envelope breaks down. In metaphase, the chromosomes line up along the middle of the cell. In anaphase, the sister chromatids separate and move towards opposite poles of the cell. Finally, in telophase, the nuclear envelope reforms around each set of chromosomes, and the cell divides into two daughter cells.

The cell cycle is tightly regulated by a variety of checkpoints and regulatory proteins to ensure that cells divide accurately and only when necessary. Mutations or errors in these processes can lead to diseases such as cancer.