: Asimov describes blood as an "indefatigable transit system" responsible for transporting oxygen, nutrients, hormones, and vitamins while removing waste products like carbon dioxide and nitrogen. Evolutionary Origins
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Upon arrival, the sabotage escalates. A major dome is breached, and the protagonists witness the terrifying power of the "Living River." The water pressure and the aggressive aquatic life (V-frogs and other creatures) make every breach a catastrophe. Asimov creates high tension by describing the water not just as H2O, but as a weight that can crush steel and a medium for alien intelligence. : Asimov describes blood as an "indefatigable transit