Respiratory System

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Which parts of the respiratory system divide into smaller and smaller tubes?

What excretory organ eliminates carbon dioxide from the body?

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

During gas exchange, what substance moves from the alveoli to the blood?

The dome-shaped muscle that pulls air into the lungs is the

What 2 things are eliminated from the body when you exhale?

What is the name of the small flap of tissue that seals the trachea when you swallow?

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