The basic structural, functional, and biological unit of all known living organisms is the cell. Cells replicate by growing and dividing. A massive number of cell division cycles are constantly occurring during developing and normal maintenance of your body. This section covers the process of cell division on a molecular level, and further explores biosignalling, human reproduction, and development.

The contents within this section closely follow the AAMC section: Biological and Biochemical Foundations of Living Systems: Content Category 2C