Biceps curl with dumbbell

Corneal injury

This animation shows corneal infections resulting from corneal injury.

• Vision

Hip abduction walk with resistance tubing

The hip abduction walk targets the hip muscles. See how it's done.

Heart and circulatory system

Watch this video to see how a healthy heart works.

Tramadol: Approved Uses and Pain Mechanism

A brief description of approved tramadol uses, formulations, and mechanism of action. Learn more about tramadol at: https://www.drugs.com/tramadol.html

• Tramadol

Types of Headaches

A comparison of different types of headaches: cluster, tension, and migraine; their trigger points; and their symptoms.