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What is Placenta ? Mention its role during pregnancy.

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What is Placenta ? Mention its role during pregnancy.
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The placenta is an organ found only in mammals during developmentof foetus. It is made up of cells derived from both mother and foetus. 

  • Placenta allows the exchange of materials between mother and foetus. 
  • It allows the transfer of nutrients and oxygen from mother to foetus. 
  • Waste products excreted by the foetus like urea, uric acid and even carbon dioxide are diffused to maternal blood stream by the placenta. 
  • Antibodies pass through the placenta that provides immunity to the foetus. 
  • Placenta secretes several hormones that are essential for foetaldevelopment.
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