Where does most of the digestion happen?

Question

Please explain your answer. Thank You so much i am ever so grateful!

Thanks!

Answer 1

Digestion of each type of substances takes place in different regions of the alimentary canal.

1.CARBOHYDRATE.
Most of the digestion takes place in the intestine although digestion of the carbohydrates begin in the mouth.

Enzymes present in salivary amylase does the job in the mouth. Enzymes present in the pancreatic juice and Intestinal juice (Succus entericus) does the job in the intestine.

Starch + Pancreatic amylase -------> Dextrin + Isomaltose + Maltose.
Intestinal juice contains enzymes Isomaltase, Maltase, Sucrase, Lactase.

Isomaltose + Isomaltase -------> Glucose + Glucose.
Maltose + Maltase ---------------> Glucose + Glucose.
Sucrose + Sucrase --------------> Glucose + Fructose.
Lactose + Lactase ---------------> Glucose + Galactose.

2.PROTEINS.
The digestion of proteins takes place mainly in the stomach.
The proteolytic enzymes are secreted in the stomach in their inactive form which is converted to their active form by Hydrochloric acid. The protelytic enzyme is Pepsinogen.

Pepsinogen + HCl -------> Pepsin.
Proteins + Pepsin --------> Paracaesin + Whey Protein.
Paracaesin + Ca++ ------> Calcium paracaesinate.
Calcium paracaesinate + Pepsin -----> Proteose + Peptone.

Pancreatic juice contains Trypsinogen, Chymotrypsinogen and Carboxy peptidases which when converted to their active form by Enterokinase present in Succus entericus can digest proteins.

3.FATS.
Fat digestion starts only when the food reaches the Small Intestine.

It starts with the action of bile juice from the liver. bile salts Sodium glycocholate and Sodium taurocholate breakdown the larger molecules of fat globules into smaller droplets. Thes process is called Emulsification.

Pancreatic lipase (Steapsin) acts on emulsified fat and hydrolyze them into fatty acid and glycerol.

Emulsified fat + Steapsin -------> Fatty acid + Glycerol.


Hope you find this answer good enough to choose it as the best answer.

Answer 2

Most of the digestion takes place in the small intestine of the digestive track. Many enzymes produced break food into its smallest form in the small Intestine. Even if food isnt broken down into its simplest form in the stomach, it will be done here. This is the sight of final digestion.

Answer 3

Digestion occurs in our whole abdomen through various systematic procedures but it's mainly in the intestines where every bit of useful nutrients is taken for our use and the waste is thrown.

Answer 4

the whole digestive system.

i would say the intestines or the stomach. the stomach because this is where the acid is added and food is properly broken down, but your intestines start parting all the food into good stuff and the bad stuff (what you poo)

Answer 5

Most digestion, as well as absorption of digested food, occurs in the small intestine. This narrow, twisting tube, about 2.5 cm (1 in) in diameter, fills most of the lower abdomen, extending about 6 m (20 ft) in length. Over a period of three to six hours, peristalsis moves chyme through the duodenum into the next portion of the small intestine, the jejunum, and finally into the ileum, the last section of the small intestine. During this time, the liver secretes bile into the small intestine through the bile duct. Bile breaks large fat globules into small droplets, which enzymes in the small intestine can act upon. Pancreatic juice, secreted by the pancreas, enters the small intestine through the pancreatic duct. Pancreatic juice contains enzymes that break down sugars and starches into simple sugars, fats into fatty acids and glycerol, and proteins into amino acids. Glands in the intestinal walls secrete additional enzymes that break down starches and complex sugars into nutrients that the intestine absorbs. Structures called Brunner’s glands secrete mucus to protect the intestinal walls from the acid effects of digestive juices.

The small intestine’s capacity for absorption is increased by millions of fingerlike projections called villi, which line the inner walls of the small intestine. Each villus is about 0.5 to 1.5 mm (0.02 to 0.06 in) long and covered with a single layer of cells. Even tinier fingerlike projections called microvilli cover the cell surfaces. This combination of villi and microvilli increases the surface area of the small intestine’s lining by about 150 times, multiplying its capacity for absorption. Beneath the villi’s single layer of cells are capillaries (tiny vessels) of the bloodstream and the lymphatic system. These capillaries allow nutrients produced by digestion to travel to the cells of the body. Simple sugars and amino acids pass through the capillaries to enter the bloodstream. Fatty acids and glycerol pass through to the lymphatic system.

Answer 6

i the tummy


well
its breaks off when going through the intestin to your stomach
and then its pretty much digested when all the acids dissolve it

Answer 7

small intestine.
it is the site of the end of digestion.

Answer 8

in the digestive system

Answer 9

in the brain.