Types of Absorption Disorders
Four tissue sections are shown here, two cut across the long axes of the crypts and two cut parallel to the long axes. The gastrointestinal tract digestive tract , digestional tract , GI tract , GIT , gut , or alimentary canal is an organ system within humans and other animals which takes in food, digests it to extract and absorb energy and nutrients, and expels the remaining waste as feces. American Journal of Roentgenology ; 3: Anatomical terminology [ edit on Wikidata ]. Muscles Spaces peripharyngeal retropharyngeal parapharyngeal retrovisceral danger prevertebral Pterygomandibular raphe Pharyngeal raphe Buccopharyngeal fascia Pharyngobasilar fascia Piriform sinus.
Overview of Absorption Disorders
Unfortunately, our editorial approach may not be able to accommodate all contributions. Our editors will review what you've submitted, and if it meets our criteria, we'll add it to the article.
Please note that our editors may make some formatting changes or correct spelling or grammatical errors, and may also contact you if any clarifications are needed. The Editors of Encyclopaedia Britannica. Learn More in these related Britannica articles: Intestinal gas consists principally of swallowed air and partly of by-products of digestion. When a person is in an upright position, gas diffuses to the uppermost portions of the colon.
There it is compressed by the contraction of adjacent segments, giving rise to pain that…. Under normal atmospheric conditions, intestinal discomfort can be felt when air or gas collects in the intestines. Relief is obtained by expelling the gas…. Stomach , saclike expansion of the digestive system, between the esophagus and the small intestine; it is located in the anterior portion of the abdominal cavity in most vertebrates. The stomach serves as a temporary receptacle for storage and mechanical distribution of food before it is passed into the intestine.
Small intestine , a long, narrow, folded or coiled tube extending from the stomach to the large intestine; it is the region where most digestion and absorption of food takes place.
It is about 6. More About Intestinal gas 3 references found in Britannica articles Assorted References major reference In human digestive system: Intestinal gas cause of pain In digestive system disease: Intestinal gas role in intestinal squeeze In intestinal squeeze. Help us improve this article! Contact our editors with your feedback.
You may find it helpful to search within the site to see how similar or related subjects are covered. Any text you add should be original, not copied from other sources. At the bottom of the article, feel free to list any sources that support your changes, so that we can fully understand their context. Internet URLs are the best. Thank You for Your Contribution!
There was a problem with your submission. Please try again later. Keep Exploring Britannica Atom. Atom, smallest unit into which matter can be divided without the release of electrically charged particles. Next, the small intestine uses its brush border enzymes to further hydrolyze the food into absorbable molecules. The waste that remains after absorption moves into the large intestine where it gets transported out of the body. If anything goes awry in any stage of this process, malabsorption results.
The digestive process begins as soon as food enters your mouth. The enzymes in your saliva and the process of chewing change the bite of food into a bolus -- chewed but undigested food matter. When you swallow, your throat thrusts the bolus into your esophagus, where the muscular contractions of its walls pass it to the stomach.
When the bolus enters the stomach, acids and enzymes churn it into smaller bits of food. Only after the matter enters the small intestine and goes through the three stages of absorption does the bite of food you ingested break into individual molecules small enough to pass through the wall of your small intestine and provide nourishment to your body.
A number of conditions can cause a failure in the process of absorption. These include illness, medication, trauma and genetically-linked conditions.
If you fail to absorb the nutrients in the food you eat, health issues arise. Some forms of malabsorption apply to most nutrients while others affect a particular one.
The most common form of malabsorption, celiac disease, occurs in people who cannot digest gluten, a protein found in wheat, barley and rye grains. However, malabsorption can occur as a result of obstruction or disease of the gall bladder, liver failure, pancreatic disease, abnormal bowel mobility, overgrowth of bacteria and many other maladies and anomalies. The number one symptom of the malabsorption of protein is edema.
Your ankles, feet and hands get noticeably swollen. Your shoes and rings feel tighter and your joints feel stiff. If you press a finger into the lower part of your shin, you leave an imprint in the skin that takes many minutes to return to its normal shape. This demonstrates pitting edema.