Which term refers to the body system responsible for delivering oxygen and removing carbon dioxide?

• A. Rifle Slug
• B. Restrain Devices
• C. Respiratory System
• D. Search

Answer: (C)

Gas exchange and breathing are the job of the respiratory system. This system includes the airways, lungs, and tiny air sacs called alveoli where oxygen from inhaled air moves into the blood and carbon dioxide from the blood is released to be exhaled. Oxygen binds to hemoglobin in red blood cells and is carried to tissues throughout the body, while carbon dioxide, a waste product of metabolism, moves from the tissues into the blood and then into the alveoli to be breathed out. While the circulatory system transports these gases, the primary role of the respiratory system is to bring in oxygen and remove carbon dioxide. The other terms listed don’t describe a body system involved in respiration.