Ms. Hansen and the Explorers are very interested in learning--they want to know everything they can about the human body. But they aren't alone! The Zelmans, Xeni and Zeno, have come from their planet to learn about Earth's beings too! They travel into the circulatory system, through the heart, and out to the body to learn how the heart pumps blood through the body. Come along as the Explorers and their favorite guest's tour the human heart. Do you know how the human body works? If so, could you explain it to aliens? When the Zelmans visit Earth, they want to learn more about the human body! Luckily, they meet a teacher whose class is more than happy to jump inside and show them!
