जब मैंने किसी की मदद की हो पर अनुच्छेद हिंदी मे।
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Explanation:
External Respiration: External respiration refers to the gas exchange across the respiratory membrane of lungs. Internal Respiration: Oxygen diffuses out from the blood into tissue during internal respiration. External Respiration: Oxygen diffuses from alveolar air into the blood during external respiration.
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