Did you know...
The right lung is larger than your left even though your heart lies more in the left than the right? Some think of their lungs as being empty space but in reality they are
much like a sponge with small holes throughout them. The left lung is divided into two lobes and the right into three lobes. Together, the lungs contain approximately 1500 miles (2,400 km) of airways and 300 to 500 million alveoli, having a total surface area roughly the same area as a singles badminton court. The surface area is roughly the same area as one side of a tennis court. Now that's a big area... Furthermore, if all of the capillaries that surround the alveoli were unwound and laid end to end, they would extend for about 620 miles.
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