Cells are the most basic unit of life on the planet. All life forms are simply conglomerations of cells, ranging from the individual bacterial cells to higher order plants and animals. Humans, themselves, are made up of trillions of cells. So what exactly is a cell? Of what is it made? How does it function? In a complex organism, how do cells communicate with one another and coordinate their activities? How do they regulate their growth? What role do genes play in controlling cellular function? This course will address these questions and introduce the basic biology of cells while keeping in mind their larger role in tissues and organs. If we can understand the structures and functions of the individual cells that serve as the subunits of larger organisms, we can begin to understand the biological nature of humans and other complex life forms.