内容简介：
This comprehensive series on the workings of the body manages to be easily understandable without oversimplifying any of the complex processes that happen inside our bodies. Readers will appreciate the step-by-step introductions to various systems and organs of the body, and they will enjoy the dynamic illustrations that accompany the energetic text. Introduce your students to the amazing and exciting machine that is the human body with this engaging series.The heart is a marvelous muscle, and with this book, readers can learn all about it: how it works, what happens when it doesn't work well, and how to keep it in good shape. Students are introduced to the parts of the heart and the function that the heart plays in carrying oxygen to every part of the body, as well as the role of white and red blood cells, capillaries and more.