Modified pushup

HIV Animation

This animation shows the HIV molecule, its components, and what it does inside the body to an infected person.

Squat exercises for leg muscles

The squat is an exercise that targets the leg muscles. See how it's done.

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

EpiPen: How to use for Emergency Treatment of Allergic Reactions

EpiPens are used for the emergency treatment of severe allergic reactions, also called anaphylaxis. It’s available as a pre-filled, single-dose autoinjector.

Biliopancreatic diversion with duodenal switch

Biliopancreatic diversion with duodenal switch is a surgery that reduces the size of the stomach and the intestine to limit food intake and absorption.