Answer:
1- Moucus 2- pepsinogen 3-hydrochloric acid(gastrin)
Explanation:
muocus lines up the interior surface of stomach to protect it from protien degradation by acids 'so the stomach walls can be saved.moucus also lubricate food bolus.
hydrochloric acid convert inactive pepsinogen into active pepsin which digest food more over hydrochloric acid aslo help in digestion.
