Digestive system tract Video
Control of the GI tract - Gastrointestinal system physiology - NCLEX-RN - Khan Academy digestive system tractLarge intestine includes the colon and rectum Anus Organs that help with digestion, but are not part of the digestive tract, are the: Tongue Glands in the mouth that make saliva Pancreas Liver Gallbladder Parts of other digsetive systems, such as nerves and blood, also play a major role in the digestive process.
How does food move through the digestive system? Muscles propel food and liquid along the digestive tract in a wave-like movement. This movement is called peristalsis.
In general, there are 6 steps in the process of moving food and liquid through the digestive system: The first step in the digestive process occurs in the mouth. Digestive system tract is where food is chewed and broken down into a size that can be safely swallowed.
The start digetive swallowing food or liquid is voluntary. But once it begins, the process becomes involuntary and continues under the control of the nerves. The esophagus connects the throat above with the stomach below.
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It is the first organ into which the swallowed food goes. Where the esophagus and stomach join, there is a ring-like valve that closes digestivr passage between the 2 organs. When food nears the closed ring, the surrounding muscles relax and allow the food to pass into the stomach. It then closes again.
The food then enters the stomach. The stomach completes 3 mechanical tasks. It stores, mixes, and empties: First, the stomach stores the swallowed food and liquid. This needs the muscle of the upper part of the stomach to relax and accept large volumes of swallowed material.
Science Teacher Resources from Baylor College of Medicine
Second, the lower part of the stomach mixes up the food, liquid, and digestive juices made by the stomach through muscle action. Third, the stomach empties the contents into the small intestine. The food is digested in the small intestine. It is dissolved by the juices from the pancreas, liver, and intestine.
The contents of the intestine are mixed and pushed forward to allow further digestion. Last, the digested nutrients are absorbed through the intestinal walls.
Overview of the Digestive System
The waste products, including undigested parts teact the food fiber and older digestive system tract that have been shed from the lining of the intestine mucosamove into the colon. Waste products in the colon often remain for a day or two until the feces are expelled by a bowel movement. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions. Contact Our Health Professionals.]
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