Documents 20.2: The Respiratory System: the exchange of gases

20.2: The Respiratory System: the exchange of gases Section Objectives: Identify the structures involved in external respiration. Contrast external and cellular respiration…

Documents Why a respiratory system? Need O 2 in – for cellular respiration – make ATP Need CO 2 out –...

Why a respiratory system? Need O2 in for cellular respiration make ATP Need CO2 out waste product Passageways and Lungs Respiratory system consists of a pair of lungs &…

Documents 20.2: The Respiratory System: the exchange of gasesThe Respiratory System: the exchange of gases...

20.2: The Respiratory System: the exchange of gases Section Objectives: Identify the structures involved in external respiration. Contrast external and cellular respiration…