External respiration takes place in the ____________________.
(1 point)
Responses
bronchi
bronchi
trachea
trachea
alveoli
alveoli
diaphragm
The correct answer is: alveoli
External respiration takes place in the alveoli.
External respiration takes place in the alveoli.
To arrive at this answer, we need to understand the process of respiration. Respiration involves the exchange of oxygen and carbon dioxide between the body and the external environment. It consists of two main processes: external respiration and internal respiration.
External respiration occurs in the lungs, where oxygen from the air is brought in and carbon dioxide is expelled. This process takes place in the tiny air sacs called alveoli. The alveoli are located at the end of the bronchial tree, which includes the bronchi and trachea.
The bronchi and trachea are part of the respiratory system and serve as the passageways for air to enter and exit the lungs. However, the actual exchange of oxygen and carbon dioxide takes place in the alveoli. Oxygen from the inhaled air diffuses into the bloodstream through the thin walls of the alveoli, while carbon dioxide from the blood is released into the alveoli to be exhaled.
Therefore, the correct answer is alveoli.