Fitness basics
Learning Center
Video: Rotator cuff damage
See how your rotator cuff can become damaged.
Video: Ovulation
Ovulation — the release of an egg from an ovary — occurs about midway through the menstrual cycle. See how it happens.
Video: Melanoma — Early stage and advanced melanoma
Melanoma — Video explains early-stage melanoma and advanced melanoma.
Video: How cancer spreads
Watch this video to see how cancer spreads (metastasizes).
Video: Heart and circulatory system
Watch this video to see how a healthy heart works.
Video: Endovenous thermal ablation
Video showing endovenous thermal ablation procedure to treat varicose veins.
Video: 3 things you didn't know about cold sores
Cold sores on the lips can be embarrassing and tough to hide. Most people who are infected with the virus that causes cold sores never develop symptoms.
Vertebral tumor
Learn about these tumors that grow in the bones of the spine, causing pain and weakening the spinal column. Find out about diagnosis and treatment.
VLDL cholesterol: Is it harmful?
Like LDL cholesterol, very-low-density lipoprotein (VLDL) cholesterol is considered a type of 'bad' cholesterol.
Types of psoriasis
Learn to identify types of psoriasis, such as guttate psoriasis and scalp psoriasis, by appearance.
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