• Case@lemmy.world
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      7 days ago

      I mean, or literal.

      Humans are a series of tubes to begin with.

      Your blood vessels? Your downstairs plumbing? Even your lungs, the alveoli serve as teeny tiny tubes that are short and bulbous, that exchange gases through other tubes!

      There are some other shapes, but what keeps the human machine going? Friggin’ tubes.