Every human body is composed of millions of microscopic cells, each one functioning in an interdependent network that allows us to survive. The inside of the cell is a complex machine designed to produce energy, make proteins with a wide variety of functions, and create new cells. Though the cells are tiny, they're critical to life. The human cell is fascinating in its complexity and ability to work in tandem with other cells. Understanding the function of cells goes a long way toward understanding how the human body works. This book is a brief introduction to the human cell. It's written for everyone, regardless of your previous knowledge of science or the human body. This series won't make you a doctor, but it certainly will help you understand your body.