IIN that I can't stop thinking about a guy I don't know?

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  • seakelp
    9 years ago | pl

    All require some sort of vascular fluid that supplies organs with nutrients and removes waste.

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    • teltrum
      9 years ago | pl

      So all animals have blood?

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      • seakelp
        9 years ago | pl

        All vertebrates, certainly. Insects have an equivalent analog. All animals metabolize oxygen, and need some system that includes the liquid transport thereof.

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