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Herniated nucleus pulposus (slipped disk)

This animation shows displacement of an inter vertebral disk (disk between the vertebrae).


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Parkinson

This animation shows sporadic brain activity and a twitching hand that occur with Parkinson's disease, followed by treatment with dopamine stimulation.

Plan B and STDs: Actions to Take if You

Tips to avoid pregnancy and sexually transmitted diseases after unprotected sex.

Biceps curl with barbell

The biceps curl builds strength in the upper arm. See how it's done.

Seated row with weight machine for upper back

The seated row with weight machine targets the muscles in the upper back. See how it's done.

How to use a single-dose dry powder inhaler

Watch this video to learn how to use a single-dose dry powder inhaler.

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