Question

why do we need of mechanical crushing of food​

Answer 1

Explanation:

There is need of mechanical crushing of food. Hence the food in the mouth has to be broken down into tiny pieces to increase the surface area for action of substances that help in digestion. ... The teeth help in cutting and grinding while tongue helps in spread out the food and help in mixing it with saliva

Answer 2

There is need of mechanical crushing of food. Hence the food in the mouth has to be broken down into tiny pieces to increase the surface area for action of substances that help in digestion. Teeth help in chewing food material. The circular muscles of the food to be pushed into the oral cavity and to be moved around