The Human Lung

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Category: Human Anatomy

Published on Saturday, 08 November 2008 14:39

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The human lungs are the organs of respiration in humans. Humans have two lungs, with the left being divided into two lobes and the right into three lobes. Together, the lungs contain approximately 2400 km of airways and 300 to 500 million alveoli, having a total surface area of about 70 square metres in adults. Furthermore, if all of the capillaries that surround the alveoli were unwound and laid end to end, they would extend for about 992 km. Each lung weighs 1.1 kilograms, therefore making the entire organ about 2.3 kilograms.

For more diagrams of the human body and to learn more about human anatomy see this human anatomy resource.

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