Sign up for free

Newsletters

Once a month
get new photos
and expert tips.

Science and Space
Main Health and Human Body Earth Space Prehistoric World A-Z

Lungs Cast

Bronchi fan out like coral in this resin cast that also shows pulmonary arteries and trachea. The bronchi supply air and pulmonary arteries supply blood to the lungs. Together they take in air from the atmosphere, oxygenate the blood, and excrete the carbon dioxide back out of the body.

Photograph by Martin Dohrn/Royal College of Surgeons/Science Photo Library