English
中国人
ខ្មែរ
In a dark, forgotten valley stood a castle that had been home to vampires for centuries. Inside its cold stone walls lived a small robot named Bolt, who had been built to clean and repair the ancient halls. Bolt was afraid of the castle's shadows, especially the deep, red glow that came from the basement. However, he had one friend: a brave red blood cell named Ruby, who often floated beside him and told him stories about the human body. One stormy night, Ruby said, "Bolt, I must go on a dangerous journey through the heart and lungs. Will you come with me?" Bolt's circuits trembled, but he nodded because he didn't want to lose his only friend.
Ruby explained that she needed to travel through the heart, which acts like a powerful pump that pushes blood around the body. "If the heart stops pumping, all cells like me would die," she said. Bolt listened carefully as they entered a large chamber called the right atrium. From there, Ruby was pushed into the right ventricle, and then through a tube called an artery that led to the lungs. Bolt followed her, his metal feet clanking on the wet floor. Along the way, Ruby picked up oxygen, which is essential for every cell to live. "Without oxygen, our bodies cannot make energy," she told Bolt. He began to understand that this journey was not just scary—it was important.
