Part 10 · The Senses
Same concept, other depth: Clinical Reasoning →
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| Organ | Detects | How |
|---|---|---|
| Semicircular canals (3 per ear, at right angles) | rotation (angular acceleration) | fluid lags behind as the head turns, bending a gel flap (cupula) |
| Utricle | horizontal movement and head tilt | tiny crystals (otoliths) on a gel layer shift with gravity |
| Saccule | vertical movement (lifts) | same |
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