Answer: Tongue, teeth and salivary gland.
Explanation:
The tongue in the mouth helps in pushing the food towards teeth and also helps in crushing the food to form bolus.
The teeth present in the mouth helps in breaking the big food particles to the smaller food particles. The chewing and crushing of food helps in digestion as it breaks the food in smaller size.
The salivary gland releases enzymes that helps in the digestion of carbohydrates present in the food.
