Hear Your Heart (Let's-Read-and-Find-Out Science 2)
The Heart: All about Our Circulatory System and More!
The Heart: Learning How Our Blood Circulates (3-D Library of the Human Body)
How Does Your Heart Work? (Rookie Read-About Health)
The Heart, Lungs, and Blood (Our Bodies)
The Magic School Bus Has a Heart (Scholastic Reader, Level 2)
The Amazing Circulatory System: How Does My Heart Work? (Slim Goodbody's Body Buddies)
The Heart: The Questions and Answers Book for Kids
My Bodyworks: Songs About Your Bones, Muscles, Heart And More!
Why Does My Heart Pump?: All About the Human Body (Solving Science Mysteries)