The diagram on page 474 displays the components of the human respiratory system. Refer to the diagram to respond to the following statements with T (true), F (false), or C T (can't tell):
___1. The nose, sinuses, pharynx, and trachea are part of the upper respiratory system.
___2. The branches of the trachea, the bronchus, allow air to be conducted into both lungs.
___3. One way to remember the boundary between the upper and lower respiratory systems is the first letters of larynx and lower.
___4. One function of the respiratory system is to protect internal surfaces from temperature changes.
___5. The pharynx is positioned behind the mouth.
___6. Mucous cells line the structures of the entire upper respiratory system.
___7. Air intake through the nose and mouth proceeds to the lungs through the sinuses.
___8. It is logical to infer from the diagram that a person suffering from bronchitis has an infection that could enter the lungs if left untreated.
___9. The pharynx connects to both the esophagus and the larynx.
10. The purpose of the diagram is