Saylor.org's Cell Biology/Mitosis and Cytokinesis
Every cell in your body has the capacity to divide and make new cells. Mitosis is the process by which one cell turns into two identical ones. Because of mitosis, most cells in your body don’t live past a few months. In other words, despite your chronological age, your body is really just a few months old!
Mitosis is split into four phases. This unit will carefully explore each phase, ending with cytokinesis, whereby the cell membrane will pinch itself off and split in half in order to produce two separate cells.