Media playback is unsupported on your device

Smoking: what it does to the body

28 November 2013 Last updated at 17:27 GMT

Dr John Moore-Gillon, medical adviser at the British Lung Foundation and consultant physician at the King Edward VII Hospital explains the effects of smoking tobacco.

Medical illustrations from the science photo library,

Video journalist: Smitha Mundasad

Most watched

Copyright © 2015 BBC. The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.