Final answer:
The respiratory system provides for CO₂ and O₂ exchange by bringing in air with oxygen and releasing carbon dioxide, while the circulatory system transports these gases to and from body cells. The airflow through the respiratory system follows a sequence that begins at the nasal cavity and ends at the alveoli. The pharynx serves as a common passage for both the respiratory and digestive systems.
Step-by-step explanation:
The body system that is responsible for CO₂ and O₂ exchange is the respiratory system. The respiratory system is crucial for this process of gas exchange, as it brings air containing oxygen into the body and releases carbon dioxide into the atmosphere. However, the circulatory system is also essential as it transports the gases to and from body cells. Oxygen is absorbed by the blood in the lungs and then transported to the cells for aerobic respiration, while carbon dioxide produced by cells is carried to the lungs for exhalation.
The respiratory system includes various organs and structures that air encounters in a specific order when entering the body. The correct order from the first to last is: nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles, and alveoli.
The organ that is part of both the digestive and respiratory systems is the pharynx, which acts as a pathway for both food and air.