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(Biology) Ch8: Respiratory System

Across
A gas necessary for life that is found in the air
A part of the body that has a specific job
A gas that is produced when people and animals breathe out
To move air into and out of the lungs
Down
Organs that people and other animals use to breathe air
Tubes that carry air all around the lungs
A roll of paper filled with tobacco to smoke
The path that air takes in and out of the lungs