3NT Module 6 Chapter 10 Breathing part II

3NT Module 6 Chapter 10 Breathing part II

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The respiratory system of the human body consists of

• a pair of lungs

• a diaphragm

• a windpipe

• a heart

Lungs

• —The lungs contain many air sacs (alveoli) surrounded by blood vessels

  —Oxygen in the inhaled air moves from the lungs into the bloodstream.

  —

  —Carbon dioxide moves from the bloodstream into the lungs to be exhaled.