Leo+DadMade for Leo
← Living Systems
Concept · 4 steps · NESA SC4-LIV-01

Levels of Organisation

The one idea that explains how a body is built — life in nested layers, from a single cell all the way out to a whole organism, and back. Four short steps, each with its own toy to play with.

1 Where it comes fromLife is built in nested layers. Drag the zoom slider from a single cell out to a whole human. 2 How to do itPlace anything on the ladder, build a chain of examples, and learn the rule that structure suits function. 3 Where it gets trickyA cell isn't an organism, a tissue isn't an organ, and one system can borrow another's organ. 4 Out in the wildA fault at one level ripples to the rest — and reasoning backwards from a symptom to the level involved.
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