Bigger animals, like Elephants, or Dinosaurs for example, are in need for more oxygen than the amount of oxygen that small animals need? (humans, dogs, cats, etc)
Thanks in advance.
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Animals with the same metabolic rates need the same amount of oxygen per unit body mass, larger animals have slower metabolisms than smaller ones (that's also why they need less food per unit body mass). 1 ton of rats use more oxygen than 1 ton of elephant. bigger animals need better ways to distribute the oxygen, that is better ways to absorb and transport it. One of the reason Sauropods got so big was they have a much better breathing mechanism than mammals.