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An exchange surface is in direct contact with the external environment in the ______?

An exchange surface is in direct contact with the external environment in the ______?

ایکسچینج کی سطح ______ میں بیرونی ماحول کے ساتھ براہ راست رابطے میں ہے؟
Explanation
  • The lungs serve as an exchange surface in direct contact with the external environment, facilitating gas exchange (oxygen and carbon dioxide).
  • This occurs through the alveoli, where air meets blood vessels.