The City Within: Your Body's Cells

You are not a single being; you are a bustling city of trillions of cells. These tiny workers

team up to form tissues, which build organs like your heart and lungs.

These organs then form systems that run your entire body. Your respiratory

system grabs oxygen, and your circulatory system is the high-speed delivery service, dropping it off

to every single cell. This whole operation is powered by respiration—turning sugar and oxygen

into the energy you need to live. It’s the ultimate teamwork, a perfectly coordinated

universe working nonstop, just to keep you going.