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A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

ScienceOne small ahaBody system

Part of the eye controlling light entry

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ScienceOne small aha
Your new ahaIris

The iris changes pupil size by contracting different muscles. Source: Iris (anatomy) ↗

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More from Human Body

A few more worth knowing.

  1. 34Basic unit of the nervous systemRECALL
    Neuron

    Neurons transmit electrical and chemical signals

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  2. 35Largest part of the human brainRECALL
    Cerebrum

    Supports thought, memory and voluntary movement

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  3. 36Joint connecting upper arm and forearmRECALL
    Elbow

    A hinge-type synovial joint

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