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.
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
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.
Oxygen enters the lungs through the trachea, which branches into two tubes called the bronchi, which lead to the lungs.
The correct statement is: Oxygen enters the lungs through the trachea, which branches into two tubes called the bronchi, which lead to the lungs.
To understand how oxygen enters the lungs, we need to have a basic understanding of the respiratory system. When we breathe, air enters our body through the nose or mouth and travels down a tube called the trachea, also known as the windpipe. The trachea then branches into two smaller tubes called the bronchi, with one bronchus leading to each lung.
The bronchi further divide into smaller tubes called bronchioles, which continue to branch out and become even smaller in size. Eventually, the bronchioles end in tiny air sacs in the lungs called alveoli. It is within these alveoli that the exchange of oxygen and carbon dioxide takes place.
Therefore, oxygen enters the lungs through the trachea, which branches into two tubes called the bronchi, leading to the lungs.