why do big animals never breathe directly through thier skin



  1. 0 Votes

    The bigger an animal gets the farther away its vital organs are from the air.  Animals the size of a flatworm or smaller can breath through their skin because nearly all their cells that need air are right their on the inside of their skin.  The air is pretty much travelling through a veil and not very far.  Animals largers than this require lungs to pump the air throughout the body and exchange the gases quickly.  

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