9. It is a hollow anyan that holds and squeezes the food while it is being mixed with gastric juices. a liver b. small intestine cesophagus d stomach 10. What do you call the process of breaking down of food into simple nutrients that can be used by de body cells of the body? a arculation b. digestion e respiration d excretion 11. What system is responsible for talong in oxygen and expelling of carbon dioxide a Craulatory System b. Nervous System c Respiratory system Digestive System 12 These are grzpe-like structures at the end of the bronchules. a Bronchi b Alreoli c Trachea 4 Gà 13. What gas do you talce in or inhale? a Oxygen b. Nitrogen c Carbon dioxide d. Hydrogen