1. What helps us breathe? ______. The respiratory system
a) The lungs (Die Lungen)
b) The respiratory system (Das Atmungssystem)
c) The windpipe (Die Luftröhre)

2. What carries air to the lungs? ______. The windpipe
a) The alveoli (Die Alveolen)
b) The windpipe (Die Luftröhre)
c) The nose (Die Nase)

3. How do nurses monitor oxygen levels? ______. Using a pulse oximeter
a) Using a pulse oximeter (Mit einem Pulsoximeter)
b) By checking blood pressure (Durch Überprüfung des Blutdrucks)
c) By taking a deep breath (Durch tiefes Einatmen)

4. What are the tiny air sacs in the lungs called? ______. The alveoli
a) The alveoli (Die Alveolen)
b) The bronchi (Die Bronchien)
c) The trachea (Die Luftröhre)

5. What can weaken the immune system during treatment? ______. Chemotherapy
a) Chemotherapy (Chemotherapie)
b) Oxygen therapy (Sauerstofftherapie)
c) Lung infections (Lungeninfektionen)