UNIT OVERVIEW

Every second, millions of cells in your body divide. This creates new cells to help you grow, heal wounds, and replace old cells. The process of cell division is called mitosis.

In this unit, you will learn:

• How cells prepare to divide (the cell cycle)
• What chromosomes are and how they work
• The four stages of mitosis
• How plant and animal cells divide differently
• Why mitosis matters for living things
• What happens when cell division goes wrong (cancer)