What is the longest segment of the GI tract where most absorption takes place?
, Consist of 3 SECTIONS: DUODENUM (main place of absorbtion), JEJUNUM, and ILEUM. The longest portion of the GI tract where most digestion and absorption takes place. Fingerlike extensions of the intestinal mucosa that increase the surface area for absorption.
Chyme, a thick semifluid mass of partially digested food and digestive secretions that is formed in the stomach and intestine during digestion. In the stomach, digestive juices are formed by the gastric glands; these secretions include the enzyme pepsin, which breaks down proteins, and hydrochloric acid.
- Chyme or chymus (/ka?m/; from Greek χυμός khymos, "juice") is the semi-fluid mass of partly digested food that is expelled by the stomach, through the pyloric valve, into the duodenum (the beginning of the small intestine).
- Peristalsis, involuntary movements of the longitudinal and circular muscles, primarily in the digestive tract but occasionally in other hollow tubes of the body, that occur in progressive wavelike contractions. Peristaltic waves occur in the esophagus, stomach, and intestines.
- Mastication or chewing is the process by which food is crushed and ground by teeth. It is the first step of digestion and it increases the surface area of foods to allow more efficient break down by enzymes.
The chyme, or partially digested food from the stomach, is pushed along the small intestine by muscle contractions called peristaltic waves. Most of the chemical digestion and breakdown of the food happens in the duodenum. Food is mixed with bile from the gallbladder and digestive juices from the pancreas.
- Chyme has a low pH that is countered by the production of bile, helping to further digest food. Chyme is part liquid and part solid: a thick semifluid mass of partially digested food and digestive secretions that is formed in the stomach and small intestine during digestion.
- WHAT HAPPENS TO FOOD IN THE MOUTH? Saliva softens and moistens food and washes over TASTE BUDS in the tongue so that flavors can be identified. The digestive process also begins in the mouth—saliva contains chemicals that break down some foods.
- The second job is to mix up the food, liquid, and digestive juice produced by the stomach. The lower part of the stomach mixes these materials by its muscle action. (The mixture is referred to as chyme.) The third task of the stomach is to empty its contents slowly into the small intestine.
The large intestine consists of three major segments, the cecum (which receives chyme from the small intestine), the colon, and the rectum. As peristalsis moves chyme through the colon, water is absorbed to gradually convert the chyme into semisolid material called feces.
- Chyme: the name given to the partially digested food that leaves the stomach via the pyloric valve into the small intestine (duodenum). Chyme, also known as chymus has the consistency of oatmeal.
- Information on Common GI Conditions
- Acid Reflux, Heartburn, GERD.
- Nausea and Vomiting.
- Peptic Ulcer Disease.
- Abdominal Pain Syndrome.
- Belching, Bloating, Flatulence.
- Biliary Tract Disorders, Gallbladder Disorders and Gallstone Pancreatitis.
- Gallstone Pancreatitis.
- The large intestine consists of three major segments, the cecum (which receives chyme from the small intestine), the colon, and the rectum. As peristalsis moves chyme through the colon, water is absorbed to gradually convert the chyme into semisolid material called feces.
Updated: 23rd September 2018