by greendoorgang on April 5th, 2007

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Why do we have 2 kidneys, 2 Lungs (in case one packs up), but only 1 Heart and 1 Liver and pretty much everything else?

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by audiogal on April 5th, 2007
With paired organs, you can lose one and function okay. If you lose 50% of your cardiac output, you'll die anyways, so there would be no benefit to having two. The liver can regenerate, so that's almost like having a backup!
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- Then why do we have only 1 stomach? Would eating half as much kill us? We can potentially have 2 stomachs in case 1 fails? And by your logic, wouldn't we have 2 hearts; in case 1 fails. Please read my blog:
  
  http://ilupper.blogspot.com/2009/10/1-vs-2-why-we-have-2-kidneys.html
  
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  by ilupper on October 26th, 2009
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Why do we have 2 kidneys, 2 Lungs (in case one packs up), but only 1 Heart and 1 Liver and pretty much everything else?

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Why do we have 2 kidneys, 2 Lungs (in case one packs up), but only 1 Heart and 1 Liver and pretty much everything else?

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