Which of the following is true about the digestive system?

• A. It stores bile
• B. It filters waste from blood
• C. It includes the listed organs
• D. It is the primary site of gas exchange

Answer: (C)

The digestive system is the grouping of organs that work together to break down food and absorb nutrients. It includes the mouth, esophagus, stomach, and the small and large intestines, along with accessory organs such as the liver, pancreas, and gallbladder. The statement that it includes the listed organs is true because those organs are part of this system. The other options mix up where certain functions happen: storing bile is done by the gallbladder, not the entire digestive system; filtering waste from the blood is a job of the kidneys in the excretory system; and gas exchange occurs mainly in the lungs of the respiratory system.