3. Which of the following statements best describes how oxygen enters the lungs? (1 point)
Oxygen enters the lungs through the trachea, which branches into two tubes called the bronchi, which lead to the lungs.
Oxygen enters the lungs through the diaphragm, which branches into two tubes called the trachea
Oxygen enters the lungs through bronchi, which branches into two tubes called the bronchioles.
Oxygen enters the lungs through the trachea, which branches into the alveoli.