How cancer spreads

Cancer of the throat or larynx

From a top view of the voice box (larynx) and vocal cords, this animation shows the formation of a malignant tumor on the right vocal cord.

• Cancer

Mitral valve regurgitation

Mitral valve regurgitation is shown in this video.

Anatomy of Nicotine Addiction

This animation illustrates how smoking changes your brain, causing nicotine addiction.

Can the Birth Control Pill Affect Sex Drive?

Brief overview of decrease sexual desire related to oral contraceptive use and possible alternatives.

• Birth Control

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