How to measure blood pressure using an automatic monitor

How to use a single-dose dry powder inhaler

Watch this video to learn how to use a single-dose dry powder inhaler.

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

Mitral valve regurgitation

Mitral valve regurgitation is shown in this video.

Plank with fitness ball

You can do many core exercises with a fitness ball. See the plank.

Fetal ultrasound

Fetal ultrasound provides a glimpse of your developing baby.