We don't often think about it, but we'd be a pile of skin and other organs without our bones. This helpful guide to the human skeleton presents readers with a key body system. They will be acquainted with groups of bones such as the spine and skull and learn what they need to do to keep their bones healthy. Carefully chosen photographs and illustrations support the accessible text, which is a valuable introduction to several key biology concepts.

The heart carries oxygen-rich blood to our cells every second of our lives, and we don't even have to do much to keep this muscular organ moving. Incredibly, it only takes about 60 seconds to pump blood to every cell in the entire body! This fun fact and many more are found in this informative volume. Readers will learn about the different chambers of the heart, the path of blood through it, and how it works with blood vessels. Supportive illustrations,...

All our movements depend on our amazing muscles. In this lively volume, readers will discover how the three kinds of muscles-skeletal, cardiac, and smooth-work in collaboration with their other body parts to keep them moving. They'll learn what extraordinary machines the human body's more than 600 muscles are as well as how to keep them healthy and toned. Accessible text and supporting diagrams and photographs make this book a valuable tool in addressing...