Bony structure protecting the brain

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Your new ahaSkull

The cranium surrounds the brain Source: Skull ↗

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33Part of the eye controlling light entryRECALL
Iris
It changes the size of the pupil
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34Basic unit of the nervous systemRECALL
Neuron
Neurons transmit electrical and chemical signals
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35Largest part of the human brainRECALL
Cerebrum
Supports thought, memory and voluntary movement
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