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How We Breathe

Chapter 8:3
Across
______ comes into your body through your nose and mouth.
_______ returning to the heart from the rest of the body is full of carbon dioxide.
A tube that connects the trachea to a lung.
Bronchiole are so small you need a _________ to see them.
The exchange of carbon dioxide and oxygen is called ________.
At rest, you usually breathe about ____ times a minute.
The passageway between the mouth and the esophagus for air and food.
The walls of the alveoli are only one _____ cell thick.
Carbon dioxide leaves the body when you _______.
Down
Just like the heartbeat, breathing is _____
A tube that branches off the bronchus.
Another name for a trachea is a __________.
A tiny sac at the end of each bronchiole that holds air.
The lungs stretch and you take in about half a ______ of air.
The voice box.