Medically the review by Katherine Marengo LDN, R.D., specialty in nutrition — composed by Rachel Nall, MSN, CRNA — to update on September 5, 2018

When it pertains to digestion, chewing is only fifty percent the battle. As food travel from her mouth into your digestive system, it’s broken down through digestive enzymes that turn it right into smaller nutrients that her body can conveniently absorb.

You are watching: Which of the following is not involved in mechanical digestion?

This breakdown is well-known as chemistry digestion. Without it, her body wouldn’t be able to absorb nutrient from the foods you eat.

Read on to learn an ext about chemical digestion, including exactly how it’s different from mechanical digestion.

Chemical and also mechanical digestion space the two techniques your body provides to malfunction foods. Mechanically digestion entails physical motion to make foods items smaller. Chemistry digestion uses enzymes to failure food.

Mechanical digestion

Mechanical digestion begins in her mouth through chewing, then moves come churning in the stomach and segmentation in the little intestine. Peristalsis is also part of mechanically digestion. This refers to involuntary contractions and also relaxations of the muscles of her esophagus, stomach, and intestines to malfunction food and also move it v your digestive system.

Chemical digestion

Chemical digestion requires the secretions of enzyme throughout her digestive tract. These enzymes rest the chemistry bonds that hold food corpuscle together. This enables food come be broken down into small, digestible parts.

How they work together

Once food particles reach your little intestine, the intestines proceed to move. This helps store food particles moving and exposes much more of them to cradle enzymes. These motions also help to move the spend food toward the huge intestine for ultimate excretion.

Digestion involves taking big portions the food and breaking castle down right into micronutrients tiny enough come be took in by cells. Chewing and also peristalsis help with this, however they don’t do particles little enough. That’s where chemical digestion come in.

Chemical digestion breaks down different nutrients, such as proteins, carbohydrates, and also fats, into also smaller parts:

Fats break down into fatty acids and monoglycerides.Nucleic acids break down into nucleotides.Polysaccharides, or carbohydrate sugars, break down right into monosaccharides.Proteins break down right into amino acids.

Without chemical digestion, your body wouldn’t have the ability to absorb nutrients, bring about vitamin deficiencies and also malnutrition.

Some people may lack details enzymes offered in chemical digestion. For example, human being with lactose intolerance generally don’t make enough lactase, the enzyme responsible because that breaking under lactose, a protein discovered in milk.

Chemical digestion begins in your mouth. As you chew, her salivary glands relax saliva right into your mouth. The saliva includes digestive enzyme that begin off the process of chemical digestion.

Digestive enzymes found in the mouth include:

Lingual lipase. This enzyme breaks under triglycerides, a sort of fat.Salivary amylase. This enzyme breaks under polysaccharides, a complicated sugar that’s a carbohydrate.

Chemical cradle doesn’t simply stop with enzymes in your mouth.

Here’s a look at at some of the key stops top top the digestive system involving chemical digestion:


In your stomach, unique chief cells secrete cradle enzymes. One is pepsin, which breaks under proteins. Another is gastric lipase, i m sorry breaks down triglycerides. In your stomach, your body absorbs fat-soluble substances, such together aspirin and also alcohol.

Small intestine

The little intestine is a significant site because that chemical digestion and absorption of crucial food components, such as amino acids, peptides, and also glucose for energy. Over there are many enzymes exit in the little intestine and also from the nearby pancreas for digestion. These include lactase come digest lactose and also sucrase come digest sucrose, or sugar.

Large intestine

The big intestine doesn’t relax digestive enzymes, yet it does contain bacteria the further breakdown nutrients. It also absorbs vitamins, minerals, and water.

See more: Can You Play Japanese Ds Games On American 3Ds, Is The Nintendo 3Ds Xl Region Free Or Locked

Chemical digestion is a an important part the the digestive process. Without it, her body wouldn’t be able to absorb nutrient from the foods items you eat. While mechanical digestion entails physical movements, such as chewing and muscle contractions, chemical digestion supplies enzymes to malfunction food.


Medically the review by Katherine Marengo LDN, R.D., specialty in nutrition — created by Rachel Nall, MSN, CRNA — update on September 5, 2018