What is a mitochondrion? Why do cells divide? How do organs work together? The Human Machine asks the questions that young people want answered. Each chapter contains a different question, so readers can develop their knowledge.

What is a gamete? Why do we have chromosomes? How are genes passed down? The Human Machine asks the questions that young people want answered. Each chapter contains a different question, so readers can develop their knowledge.

What is a hypothalamus? How do reflexes work? Why is water important for a healthy brain? The Human Machine asks the questions that young people want answered. Each chapter contains a different question, so readers can develop their knowledge.

Titles in this series look at the human body and how we can keep each body system healthy and working properly. Features specially commissioned illustrations showing the inner workings of the human body. Analogies with familiar machines show how human body parts and systems work together.