A Comparison of mechanical digestion and chemical digestion?
chemical digestion is breaking down with saliva, and mechanical digestion is chewing...(break down with chew!):):P
Mechanical digestion chops the food in to smaller pieces, thus exposing more of it to the enzymes of the chemical digestion. Mechanical digestion begins in the mouth by the teeth, tongue and saliva. Mechanical digestion is important for chemical digestion because when food is broken down into smaller particles by mechanical means, chemical digestion will be more efficient.
The mouth, stomach, and (indirectly) the intestine involve both chemical and mechanical digestion. The mouth both breaks up food with the teeth and tongue, and breaks down starches with the enzyme amylase. The stomach breaks down food with its churning muscular action, and breaks down food chemically with hydrochloric acid and other enzymes. In the intestine, bile supplied by the gallbladder emulsifies fats (breaks them into smaller particles). This action is a form of mechanical…
Although the mechanical digestion doesn't necessarily begin before the chemical digestion (Amylase in the saliva) mechanical digestion increases the surface area of the food by smashing and grinding, which in the chemical digestion that follows increases its exposure to digestive juices. Chemical digestion in f.ex the stomach is thus enhanced
Mechanical Digestion (or physical digestion) is more about the mouth. It's chewing, biting, breaking down, and sofening the food. This is why its called "Mechanical" Digestion. Mechanical digestion involves the pulverizing and crushing of food particles, usually by chewing. Chemical digestion occurs through the secretion of digestive juices.