Which of the following statements best describes how oxygen enters the lungs?

Question

(1 point)
Responses

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 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 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 bronchi, which branches into two tubes called the bronchioles.

Oxygen enters the lungs through the trachea, which branches into the alveoli.

Answer 1

Oxygen enters the lungs through the trachea, which branches into two tubes called the bronchi, which lead to the lungs.

Answer 2

External respiration takes place in the ____________________.
(1 point)
Responses

bronchi
bronchi

trachea
trachea

alveoli
alveoli

diaphragm
diaphragm

Answer 3

External respiration takes place in the alveoli.

Answer 4

Oxygen is carried by the ______________, which is part of the red blood cell.

Answer 5

Oxygen is carried by the hemoglobin, which is part of the red blood cell.