Which substances are produced during respiration?

Where in the respiratory system does gas exchange occur?

The role of the respiratory system is to bring what substance into the body?

During gas exchange, which substances move from the alveoli into the blood?

The dome-shaped muscle that plays a role in breathing is the

What happens to cause air to be exhaled from the lungs?

Which chemical in tobacco smoke binds to hemoglobin ?

Which chemical in tobacco smoke is an addictive drug?

Name the condition in which smoking can irritate the breathing passages.

Each alveolus is surrounded by a network of

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