The science of poo

One of my favourite topics to teach is gut microbiology. There are so many fun and gross facts. Feces is 50% bacteria by weight. The average human has about 2 kg of bacteria associated with them and there are more bacterial cells in your gut than cells in your body. I will be using this cartoon next year.

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via: http://buttpoems.tumblr.com/post/100192532859