Where is chemical digestion located?

Mechanical digestion begins in the mouth as the food is chewed. Chemical digestion involves breaking down the food into simpler nutrients that can be used by the cells. Chemical digestion begins in the mouth when food mixes with saliva. Saliva contains an enzyme (amylase) that begins the breakdown of carbohydrates.
A.

Where does the digestion take place?

Although some digestion begins in the stomach, most digestion and absorption take place in the small intestine. The purpose of the small intestine is to finish digestion and absorb nutrients.
  • Is the liver considered part of the digestive system?

    The GI tract is a series of hollow organs joined in a long, twisting tube from the mouth to the anus. The hollow organs that make up the GI tract are the mouth, esophagus, stomach, small intestine, large intestine, and anus. The liver, pancreas, and gallbladder are the solid organs of the digestive system.
  • Why are the liver and the pancreas called digestive helpers rather than digestive organs?

    It makes digestive enzymes that flow through the pancreatic duct to the small intestine. These enzymes, along with bile from the gallbladder, break down food for use as energy by the body. The pancreas also makes insulin and glucagon, hormones that help regulate blood glucose (sugar) levels.
  • Where does most of the absorption of nutrients take place?

    The small intestine is the part of the gastrointestinal tract between the stomach and the large intestine where much of the digestion of food takes place. The primary function of the small intestine is the absorption of nutrients and minerals found in food.
B.

Where does physical and chemical digestion take place?

Physical digestion involves breaking food down into smaller pieces without making any chemical changes. Physical digestion happens in: the mouth when food is chewed. the stomach when food is squeezed and moved around.
  • Where are Carbohydrases produced?

    Summary Table of the Digestive Enzymes
    Digestive enzymeProduced in
    Protease (e.g. Pepsin)Stomach, pancreas and small intestine
    Carbohydrase (e.g. Amylase)Salivary glands, pancreas and small intestine
    Lipase (e.g. Gastric lipase)Pancreas and small intestine
  • Where does most of the digestion take place?

    Although some digestion begins in the stomach, most digestion and absorption take place in the small intestine. The purpose of the small intestine is to finish digestion and absorb nutrients.
  • Why does the stomach produce a lot of acid?

    The stomach produces hydrochloric acid. This helps to begin digestion, and it kills many harmful microorganisms that might have been swallowed along with the food. The enzymes in the stomach work best in acidic conditions - in other words, at a low pH.

Updated: 24th September 2018

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