/u/dragnabbit's posts in /r/askscience

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On the inside, do we have any organs or structures that are as unique and individual in appearance as we have on the outside? Or do all of our inside parts (except for disease or birth defect or something) pretty much look like everybody else's?

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Do all mammals need the same vitamins to survive that humans do? Are there other vitamins that non-mammal animals need to survive that mammals don't need?

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
On the inside, do we have any organs or structures that are as unique and individual in appearance as we have on the outside? Or do all of our inside parts (except for disease or birth defect or something) pretty much look like everybody else's?	1
Do all mammals need the same vitamins to survive that humans do? Are there other vitamins that non-mammal animals need to survive that mammals don't need?	1