Which organs are shared by the circulatory and respiratory systems?

Which organs are shared by the circulatory and respiratory systems?

• A. Lungs, Heart, Blood Vessels
• B. Stomach, Liver, Intestines
• C. Kidneys and Bladder
• D. Brain and Spinal Cord

Answer: (A)

Both systems hinge on gas exchange and the movement of blood to transport those gases. The lungs are where oxygen enters the blood and carbon dioxide leaves it. Around the air sacs (alveoli) are tiny blood vessels, so the blood picks up oxygen in the lungs and releases carbon dioxide. The heart then acts as the pump that drives blood through the lungs for oxygenation and back to the rest of the body. Blood vessels provide the pathways for this flow—the pulmonary vessels handle the lung circulation, while the rest of the vessels deliver oxygen to tissues and return carbon dioxide for the lungs to expel. Because the lungs enable gas exchange and the heart and blood vessels carry and deliver that gas-rich blood, these organs are the ones that connect and support both systems. Other options list organs tied to digestive, urinary, or nervous systems, which aren’t involved in the shared functions of respiration and blood circulation.

Both systems hinge on gas exchange and the movement of blood to transport those gases. The lungs are where oxygen enters the blood and carbon dioxide leaves it. Around the air sacs (alveoli) are tiny blood vessels, so the blood picks up oxygen in the lungs and releases carbon dioxide. The heart then acts as the pump that drives blood through the lungs for oxygenation and back to the rest of the body. Blood vessels provide the pathways for this flow—the pulmonary vessels handle the lung circulation, while the rest of the vessels deliver oxygen to tissues and return carbon dioxide for the lungs to expel. Because the lungs enable gas exchange and the heart and blood vessels carry and deliver that gas-rich blood, these organs are the ones that connect and support both systems. Other options list organs tied to digestive, urinary, or nervous systems, which aren’t involved in the shared functions of respiration and blood circulation.