Moving materials

Which of the following is NOT part of the respiratory system?

• pharynx

• ventricle

• trachea

• bronchus

Oxygen moves between the respiratory system and the circulatory system when it transfers from ____ to _____.

• alveoli, capillaries

• bronchi, trachea

• capillaries, veins

• bronchi, capillaries

Lungs contain millions of _____.

• alveoli

• villi

• projections

• capillaries

During gas exchange, oxygen moves into the blood, and carbon dioxide moves into the alveoli.

• True

• False

The function of the respiratory system is ...................................