Which gas is primarily absorbed from the air into the blood in the lungs?

What is the name of the air sacs in the lungs where gas exchange occurs?

The diaphragm contracts during which phase of breathing?

Which of these conditions is characterized by inflammation and narrowing of the airways?

What is the primary function of mucus in the respiratory system?

What is the name of the muscle that aids in breathing?

Which part of the respiratory system is also known as the windpipe?

Which of the following is a chronic obstructive pulmonary disease (COPD)?

What is the name for the process where oxygen moves from the alveoli into the blood?

Which structure prevents food from entering the trachea during swallowing?