by 
Mawgan
ANSWERS: 3
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"Did you know that our digestive system covers an area of about 250 square metres? Did you know that our digestive system is home to about one kilogram of bacteria that are both harmful and beneficial? " Source and further information: http://www.peterkelly.com.au/digestion.htm
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Like most living stuff, bacteria are mostly water. The density of water is 1kg per liter. So a kg of bacteria is about a liter - very roughly a four inch cube.
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Like 1 kg to 1000 000 000 000 000 kg's like you and Atlantic ocean
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