The Circulatory System

Most people know that blood is always flowing through our bodies, but many don't know how or why this happens. Readers of this informative volume will learn about the circulatory system to find the answers. This essential system not only carries blood to and from the heart, but also brings oxygen, nutrients, and other materials around the body. Accessible text and eye-catching images support struggling readers in learning about this key concept from the upper elementary science curriculum.