DNA is a code in our bodies that is responsible for how our body operates. It controls how we grow what functions our organs do and how we differ from others.The human cell contains 23 DNA molecules each containing between 500,000 to 2,500,000 nucleotide pairs. When uncoiled these molecules are 5 cm long on average. In our bodies there are 37,000,000,000,000 (trillion) cells. So if you uncoil all of the DNA in your body and lay it end to end the distance it would stretch over would be 200,000,000,000,000 meters long which is enough to complete thee round trip from Pluto to the sun about 17 times. ( the round trip is 12,000,000,000,000 which if you divide the 2 distances would give you 16.6666666666667 round trips)
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