Which part protects the lungs?
Ribs
Name of the tube that carries air to the lungs?
Trachea
Name of the air sacs where gas exchange happens?
Alveoli
The two main branches of the airway that each go into a lung are called...
Bronchi
Which process releases energy faster - respiration or combustion?
Combustion
Why does the trachea have rings of cartilage?
To hold it open