This sequence was used to explain the symptoms and causes of Chronic Obstructive Pulmonary Disorder, which affects the lungs. The video was for distribution to GPs to promote a new treatment for the disease.

© GY Graphics

Our journey takes us down the windpipe into the lungs

We see the alveoli and surrounding lung tissue

Some appear to be damaged and withered

In the airways, we see harmful bacteria build up

3D wireframe screengrabs