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The human body has around 200 different types of cells, according to my brief internet research. How does that compare to other species? Is there a classification of species based on that, i.e. number of different types of cells per organism? Using it as a proxy for complexity, which species are the most complex? Humans?

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closed as off-topic by Chris, ddiez, Bez, Cornelius, WYSIWYG Dec 13 at 4:54

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Wouldn't such a classification lead to all unicellular organism being the same species? –  canadianer Aug 14 at 14:12
    
@canadianer No, that only means that there are many species that could be classified as having only one type of cell. I was thinking more about more complex forms of life, like reptiles, mammals, etc... For instance, how many types of cells does a given species of reptile have? –  Physico Aug 14 at 17:44
    
Maybe you're not proposing an actual classification system based on the answer, but rather just curious about how numbers of distinct cell types differ among known taxa? If so, you might take the word "classification" out of your question, to prevent confusion like canadianer's. I'm not sure you would actually classify organisms differently based on whether they had 200 or 207 or 198 types of cells. But it's an interesting question! –  Jenn D. Aug 26 at 22:44
    
Yes, I'm just curious about how do different species compare based on the number of distinct types of cell!! If "classification" is not the adequate term, how would you pose the question? –  Physico Sep 5 at 20:56
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It's more or less impossible to answer this question as such a classification doesn't seem to exist. –  Chris Dec 12 at 15:05

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