explain the differences between mechanical digestion and chemical digestion!

Ans:
Mechanical digestion involves physically breaking down food materials into smaller parts, this increases the surface area of the food, larger surface area means easier chemical digestion by the gastrointestinal organs. Mechanical digestion begins with chewing and churning food material.

Chemical digestion involves enzymes and acids in the gastrointestinal organs that breaks the food from complex nutrients that the cells cannot benefit from into smaller and simpler nutrients that cells can actually use. Chemical digestion begins when the food enters the mouth, where they are digested by enzymes lipase and amylase.