The Salt‐Secreting Gland of Marine Birds

  title={The Salt‐Secreting Gland of Marine Birds},
  author={Knut Schmidt-Nielsen},
Marine birds possess salt-secreting nasal glands which produce hypertonic solutions of sodium chloride in response to osmotic loads such as ingestion of sea water. The concentration of the secreted fluid is always high, several times as high as the maximum urine concentration in birds. The presence of this gland must be considered a necessary adaptation to marine life in animals whose kidney cannot excrete high salt concentrations. The structure and blood supply to the gland indicate a… 

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