Question
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.
The correct answer is:
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 understand the respiratory system. The respiratory system is made up of several structures, including the trachea, bronchi, bronchioles, and alveoli.
The trachea, also known as the windpipe, is a tube that connects the mouth and nose to the lungs. It is responsible for conducting air to and from the lungs. When we breathe in, the trachea allows air to flow into the lungs, and when we breathe out, it allows air to leave the lungs.
The trachea then branches into two tubes called the bronchi. The bronchi further divide into smaller tubes called bronchioles, which eventually lead to tiny air sacs called alveoli. The alveoli are the primary site for gas exchange in the lungs. They are surrounded by capillaries, which allow oxygen to be absorbed into the bloodstream while carbon dioxide, a waste product of cellular respiration, is removed.
Therefore, it is the trachea that oxygen enters into the lungs, which then branches into the two bronchi leading to the lungs.