Reverse shoulder replacement

Heart and circulatory system

Watch this video to see how a healthy heart works.

Avoiding Drug Interactions

This FDA Consumer Update video provides helpful tips to avoid the three main types of interactions: drugs with food and beverages, drugs with dietary supplements, and drugs with other drugs.

Biceps curl with dumbbell

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

Baby

A baby's soft spots (fontanels) close when the skull bones fuse together. See how.

Retina

This animation shows the process in which light is transformed by the retina as electrical impulses that travel to the brain through the optic nerve.

• Vision