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The top documents tagged [co2 outneed]
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20.2: The Respiratory System: the exchange of gases
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gills alveoli elephant seals Gas Exchange Respiratory Systems
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20.2: The Respiratory System: the exchange of gasesThe Respiratory System: the exchange of gases Section Objectives: Identify the structures involved
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Why a respiratory system? Need O 2 in – for cellular respiration – make ATP Need CO 2 out – waste product O2O2 food ATP CO 2
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Respiratory system Functions 1.Moves oxygen from the outside environment into the body. 2.Removes carbon dioxide and water from the body
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