Have you ever imagined the world inside your own body? The popular anime series *Cells at Work!*, which delighted viewers on Tokyo MX, visualizes the human body as a bustling city. The show follows the daily lives of two main cells: a cheerful but clumsy Red Blood Cell on her mission to deliver oxygen, and a stoic White Blood Cell dedicated to eliminating invading germs. From battling influenza viruses to responding to a scraped knee, each episode is an action-packed and surprisingly accurate biology lesson. This educational and entertaining series has ended, but sign up for a reminder just in case it returns. You can still stream the adventures of these microscopic heroes and learn how your body works in the most exciting way possible.