Lungs
Heart
Gut
muscle cell
waiting…
🫁 Respiratory → oxygen
🍎 Digestive → glucose
❤ Circulatory carries it
↺ Reset
Oxygen loaded?
no
Glucose loaded?
no
Cell fed?
—
Click a system. The respiratory system loads
oxygen
, the digestive system loads
glucose
, and the circulatory system
carries
them to the cell. The cell only lights up once
both
arrive.
No system works alone — it takes
three
to feed one buried cell.