The Respiratory System

question 11

Multiple Choice

The respiratory system

• A) obtains oxygen from and eliminates carbon dioxide to the internal environment.
• B) consists of the heart, blood vessels and lungs.
• C) plays an important role in maintaining the proper pH of the internal environment by adjusting the rate of removal of acid-forming carbon dioxide.
• D) both (a) and (c) above.
• E) all of these answers.

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