Concept · 4 steps · NESA SC4-LIV-01

Body Systems Working Together

The one idea that ties your whole body together — no system works alone. From why a buried muscle cell needs three systems just to be fed, all the way to reasoning backwards from a stitch after a sprint. Four short steps, each with its own toy to play with.

1 Where it comes fromNo cell can feed itself. Click a system and watch oxygen and glucose travel to a hungry muscle cell. 2 How to do itDescribe any link between two systems by naming the thing they hand over — and the three-step method that nails it. 3 Where it gets trickyBreathing isn't respiration, the heart isn't respiratory, and blood doesn't make oxygen. 4 Out in the wildWhy heart rate and breathing rate climb together when you run — and reasoning backwards from what you feel.

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End of the Living-systems Body Thread