The large, hollow organs of the digestive system contain that enables their walls to move. The movement of organ walls can propel food and liquid and also can mix the contents within each organ.

Dec 14, 2017  Across the planet, humans eat on average between 1 and 2.7 kilograms of food a day, and every last scrap makes its way through the digestive system. One chance movie free online. The human digestive system breaks down the food you consume, using as much of the nutrients as possible to fuel the body. After the energy is extracted from food through the digestion process and metabolism, the remainder is excreted, or removed. The digestive process Imagine biting into a big, juicy cheeseburger. As you taste it,.

Typical movement of the esophagus, stomach, and intestine is called peristalsis. The action of peristalsis looks like an ocean wave moving through the muscle. The muscle of the organ produces a narrowing and then propels the narrowed portion slowly down the length of the organ. These waves of narrowing push the food and fluid in front of them through each hollow organ.

The human also aids in digestion. Trillions of thrive in the harsh conditions of the gut and are heavily involved in maintaining healthy nutrition, normal metabolism, and proper immune function. These commensal bacteria aid in the digestion of non-digestible, help to metabolize bile acid and drugs, and synthesize and many vitamins. In addition to assisting in digestion, these microbes also protect against by secreting antimicrobial substances that prevent harmful bacteria from proliferating in the gut.

Each person has a unique composition of gut microbes and changes in microbe composition have been linked to the development of gastrointestinal disease. The of the digestive system that act first are in the mouth—the. Saliva produced by these glands contains an enzyme that begins to digest the starch from food into smaller molecules. The next set of digestive glands is in the stomach lining.

They produce stomach acid and an enzyme that digests protein. One of the unsolved puzzles of the digestive system is why the acid juice of the stomach does not dissolve the tissue of the stomach itself. In most people, the stomach mucosa is able to resist the juice, although food and other tissues of the body cannot.