Human Anatomy and Embryology - Do you know that The lungs contain approximately 300 million alveoli, which provide an enormous surface area for gas exchange. It is estimated that the total surface
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![School of Health and Social Care - Swansea Uni al Twitter: "Did you know the surface area of the lungs is around half a tennis court!? Learn more about Respiratory and Sleep School of Health and Social Care - Swansea Uni al Twitter: "Did you know the surface area of the lungs is around half a tennis court!? Learn more about Respiratory and Sleep](https://pbs.twimg.com/media/DYWRdjsXUAA1dUY.jpg)