ANIMATED HEALTHCARE LTD / SCIENCE PHOTO LIBRARY ANIMATED HEALTHCARE LTD / SCIENCE PHOTO LIBRARY
Human lungs. Anatomical artwork of the human lungs (red, centre left and right) and respiratory system, with alveoli in the background. The heart (which has been removed here) is located between the lungs. At top is the voicebox (larynx, red) and trachea (windpipe, white), leading down to the lungs. The trachea splits (at centre) into the bronchi that supply air to each lung. The alveoli are the tiny air sacs of the lungs where gases are exchanged between the air in the lungs and the blood.
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