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Write a note on closed circulation. -

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प्रश्न

Write a note on closed circulation.

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उत्तर

  • Blood circulates throughout the body of all vertebrates, higher mollusks, and annelids via a network of blood arteries.
  • Blood travels within blood vessels and does not come into direct contact with cells or body tissues in this form of circulation.
  • Material exchange between blood and bodily tissues occurs via an intermediary fluid known as lymph.
  • Blood travels at high pressure and contains respiratory pigments such as haemoglobin for the transfer of breathing gases.
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