(The "Attack on Planet Pancreas" is a short story that I wrote as a funny way to explain what happens in type one diabetes.)
A long time ago, in a mini galaxy not that far away, there was trouble on Planet Pancreas, which is located in the Endocrine System. What trouble was this? The watchmen had failed to put the city on alert when a single Antibody Scout Ship had circled the planet a week earlier. Now, a full force of Y-shaped Antibody ships was approaching the planet. Planet Pancreas tried to protect their most valuable asset- the Insulin Factories in Beta Cell City on the Islets of Langerhans- but it was too late. The planet was under full attack!
When the dust and smoke from the attack had finally settled, the survivors looked around. The insulin factories were completely flattened. In fact, the whole Beta Cell City was destroyed.
While the citizens of Planet Pancreas were trying to recover from the attack, the Glucose Gems were trying to get out of the bloodstream highway and into the Cell Cities throughout the rest of the universe. But without the help of Insulin, there was no way for them to get in. You see, the insulin held the key to Cell Cities, and without it the Glucose Gems were stuck outside.
Gradually, changes came over the Human Body Universe. The Kidney Planets were in charge of getting rid of the extra Glucose Gems on the bloodstream highway. They took more and more water from Human Body Universe, causing the Universe to dry up and dehydrate rapidly.
The Cell Cities still needed energy to keep running. In the past, Glucose Gems had provided the needed energy, but now that insulin could no longer bring the key to the Cell Cities, the Cities had to get energy from other places. The Cell Cities turned to the Fat Fields for the needed energy. As the Fat Fields were broken down by the Cell Cities, it produced a by-product called Ketones.
The Human Body Universe was in desperate need of reinforcements. They started sending signals outside the Universe to ask for help. One day, help finally arrived. Reinforcement Insulin Shot Armies showed up on the scene, unlocking Cell Cities and letting the Glucose Gems in. The Human Body Universe was safe once again!