The diaphragm is a strong wall of muscle that contracts to create a suction in the chest to draw in air and expand the lungs. When the muscle relaxes, the chest cavity decreases and the air is pushed out.
(1 point)
The ___________ is a strong wall of muscle that contracts to create a suction in the chest to draw in air and expand the lungs. When the muscle relaxes, the chest cavity decreases and the air is pushed out.
7 answers
Which of the following statements best describes how oxygen enters the lungs?
(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.
(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.
The statement that best describes how oxygen enters the lungs is:
Oxygen enters the lungs through the trachea, which branches into two tubes called the bronchi, which lead to the lungs.
External respiration takes place in the ____________________.
(1 point)
Responses
bronchi
bronchi
trachea
trachea
alveoli
alveoli
diaphragm
(1 point)
Responses
bronchi
bronchi
trachea
trachea
alveoli
alveoli
diaphragm
External respiration takes place in the alveoli.
Oxygen is carried by the ______________, which is part of the red blood cell.
Oxygen is carried by the hemoglobin, which is part of the red blood cell.