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Last updated on April 23, 2014 at 1:22 EDT

Digestive system Reference Libraries

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Duodenal Atresia
2013-07-19 15:38:56

Duodenal atresia is a congenital closure of the lumen of the duodenum, which is the first portion of the small intestine and is separated from the stomach by the pyloric sphincter. During fetal development, the duodenum develops from the posterior portion of the foregut and the anterior portion of the midgut. The liver and pancreas originate from the diverticulum arising from the ventral part...

Liver
2013-04-30 14:18:06

The liver is the organ in charge of processing, neutralizing and excreting certain secretions for the metabolic processes. Formation and Orientation The liver is considered to be both the largest internal organ and the largest gland in the human body. It is situated just below the diaphragm, to the right of the stomach and on top of the gallbladder. There are two ways blood can travel to...

Large Intestine
2013-04-30 14:11:04

The large intestine is the organ that follows the small intestine but is the last part of the digestive tract before the waste leaves the body. Formation and Orientation The small intestine is on average about five feet long. It is composed of four distinct structural parts; the cecum, colon, and anus. The cecum is the part of the large intestine that comes first. It is separated into...

Esophagus
2013-04-30 13:37:01

The esophagus is the muscular tube that is located between the pharynx and the stomach that aids in digestion during swallowing. Formation and Orientation The esophagus is composed of four separate layers; the mucosa, submucosa, muscularis externa and the adventitia. The mucosa includes the stratified squamous epithelium, lamina propria and muscularis mucosae. The submucosa houses the...

Pharynx
2013-03-05 15:00:19

The pharynx is situated directly after the mouth and nose and lies right before the esophagus. Formation and Orientation The pharynx is divided into three separate sections. The nasopharynx is the first part of the pharynx that lies between the soft palate and the base of the skull. The pharyngeal tonsils are located on the back wall of the nasopharynx. This portion of the pharynx is...

Mouth
2013-03-05 14:37:32

The mouth is the beginning of the digestive system which takes in food and mixes it with saliva produced by glands located in the mouth. Formation and Orientation The first part of the mouth is the mouth cavity which contains the teeth and is limited by the lips, the roof, which is the hard and soft palate, and the floor of the mouth. This is the space where food is kept before it moves...

Gall Bladder
2013-03-05 14:18:48

The gall bladder is the sac-shaped organ that is the passage between the liver and intestine where bile is held. Formation and Orientation The gall bladder is relatively 8 cm by 4 cm when fully formed. The gallbladder is angled between the rectus abdominis muscle and the costal margin. It is hollow and is made up of three parts; the fundus, the body and the neck. The fundus is the part...

Endoluminal Capsule Monitoring
2013-03-04 16:02:35

Endoluminal capsule monitoring is categorized as a non-invasive medical procedure used in diagnosing and monitoring the progression of abnormalities in the gastrointestinal system. Procedure Once the need is identified to monitor the gastrointestinal system and the patient has a working system, they will ingest a water-tight capsule that contains a miniaturized wireless radio transmitter....

Salivary Glands
2013-03-04 15:44:29

Salivary glands are glands that produce both saliva and the enzyme that turns starch into maltose, called amylase. Formation and Orientation There are five separate glands that make up the salivary gland system. First, the parotid gland is the largest of the salivary glands, secreting saliva through Stensen’s ducts to help with the breakdown of food in the mouth (mastication). The...

Small Intestine
2013-03-04 15:13:09

The small intestine is the part of the digestive tract that follows the stomach and is followed by the large intestine. Formation and Orientation The small intestine is on average between 22 feet 6 inches and 24 feet 4 inches. It is composed of three distinct structural parts; the duodenum, the jejunum, and the ileum. The duodenum is the part of the intestine where most chemical...