Which system brings oxygen into the body and removes carbon dioxide?

Which system brings oxygen into the body and removes carbon dioxide?

• A. Respiratory System
• B. Circulatory System
• C. Digestive System
• D. Nervous System

Answer: (A)

Breathing and gas exchange happen through the respiratory system. This system includes the nose or mouth, airways, and lungs. When you inhale, air travels down into the lungs where oxygen passes from the air into the blood through tiny air sacs called alveoli. At the same time, carbon dioxide moves from the blood into the alveoli to be exhaled. This exchange supplies every cell with the oxygen it needs to produce energy and lets the body remove the waste gas produced by cells. The circulatory system helps move oxygen-rich blood and carbon dioxide around the body, but the actual job of bringing in oxygen and releasing carbon dioxide is done by the respiratory system. The digestive system handles nutrients from food, and the nervous system helps regulate breathing, but it’s the respiratory system that carries out the gas exchange.

Breathing and gas exchange happen through the respiratory system. This system includes the nose or mouth, airways, and lungs. When you inhale, air travels down into the lungs where oxygen passes from the air into the blood through tiny air sacs called alveoli. At the same time, carbon dioxide moves from the blood into the alveoli to be exhaled. This exchange supplies every cell with the oxygen it needs to produce energy and lets the body remove the waste gas produced by cells. The circulatory system helps move oxygen-rich blood and carbon dioxide around the body, but the actual job of bringing in oxygen and releasing carbon dioxide is done by the respiratory system. The digestive system handles nutrients from food, and the nervous system helps regulate breathing, but it’s the respiratory system that carries out the gas exchange.