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Respiratory System
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Does our body need carbon dioxide?
no
Blood carries oxygen to our ____
organs
Gas exchange happens in the _____
alveoli
Air travels down the ____ to the lungs
windpipe
What are alveoli?
millions of small air sacs where gas exchange occurs
What is not used in respiration? A) Lungs B) Esophagus C) Pharynx
B) Esophagus
What is this?
lungs
During exhalation, we breathe out ________.
carbon dioxide
What is exhalation?
we breathe out (lungs get smaller)
During inhalation, we breathe in ______.
oxygen.
What is inhalation?
breathe in air (lungs get bigger)
What are the two important processes of respiration?
1) the process of Inhaling and exhaling air 2) the process of exchanging two gases (oxygen and carbon dioxide)