save_the_souls: (oh stab wounds that brings me back...)
Allen Walker ([personal profile] save_the_souls) wrote in [community profile] driftfleet 2015-03-13 09:04 pm (UTC)

So each one can specialise in a specific task. If one type of blood cell did all the jobs- well, it might overwhelmed if you ever caught a cold or hurt yourself.
(259 comments)

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