What specialized sensory organ do fish use to detect tiny pressure
Chapter 1

The synchronized swing

Chapter 2

When cells choose team play

Chapter 3

The sovereign spine of great teams

Chapter 4

Finding your own frequency

Ch 2 · When cells choose team play
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007skaty Atlantic herring coordinate their swimming to move as a giant school

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007skaty The cell membrane establishes the physical boundary of being alive.

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007skaty Electrical signals control the rhythm of a single human heartbeat.

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007skaty The cellular slime mold Dictyostelium discoideum shifts its shape to survive

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Shoal Mates
BETA

007skaty Steer your fish into alignment to discover how sovereign status creates group coherence.

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The shape-shifting slime mold

007skaty In forest soil, up to 100,000 independent cells crawl together and merge, traveling toward light to find better reproduction spots.

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Quiz

Approximately how many individual amoeba cells can merge to form a single slime mold slug?

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Quiz

What chemical do individual Dictyostelium discoideum cells release to signal each other to merge?

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Fun Fact

Heartbeat harmony: When choral singers sing in unison, their heart rates naturally speed up and slow down at the exact same time, synchronizing their cardiac rhythms.

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The beat of a single heart

007skaty Individual heart cells achieve perfect resonance to create a single, unified heartbeat.

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Quiz

Which specific node in the human heart acts as the natural pacemaker to coordinate cell contractions?

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Quiz

What microscopic structures allow electrical signals to pass directly between adjacent heart cells?

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Glossary
multicellularity (noun)
The state of being composed of multiple cells that cooperate to function as a single integrated organism. This cooperative evolutionary transition first occurred in biological organisms roughly two billion years ago.

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Quiz

What specialized sensory organ do fish use to detect tiny pressure changes and coordinate schooling?

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Quiz

Who guides the movements of a giant school of herring when they evade a predator?

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Gossip

If you were a social animal, which group would you join?

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Quiz

What is the scientific term for the stable internal balance that living cells must actively maintain?

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Quiz

What is the double-layered structure made of lipids that forms the outer boundary of a cell?

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