4. In which organ does digestion of food start and end? A. anus-mouth C. mouth-esophagus B. mouth-stomach D mouth-small intestine 5. Which shows the correct order of food travelling through the digestive system after it is swallowed? A. stomach, esophagus, large intestine, small intestine B. small intestine, large intestine, esophagus, stomach C. esophagus, stomach, large intestine, small intestine D. esophagus, stomach, small intestine, large intestine 6. Which of the following describes the function of the respiratory system? A. It digests the food that we eat. B. It regulates the body temperature. C. It transports blood to all parts of the body. D. It helps remove carbon dioxide from the body
