Term
| overview of digestion system |
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Definition
starts at the mouth ends at anus. Purpose is to break food down into its smallest particle so it can be taken in by the body. |
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Term
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Definition
| continuous tube from the mouth to the anus. Consist of mouth, esophagus, stomach, small intestine, large intestine. 16-20 ft long |
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Term
| accessory digestive tract |
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Definition
| teeth, tongue, salivary glands, liver, gall bladder and pancreas.. which accessory organs never come in contact with food? Liver pancreas and gall bladder. |
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Term
| 6 functons of digestive system |
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Definition
- ingestion
- secretion
- mixing and propulsion
- digestion
- absorption
- defecation
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Term
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Definition
1. taking food and liquid into the mouth. |
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Term
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Definition
1. cells of the gi tract and accessory digestive organs secrete water, acids, buffers and enzymes in to the lumen of the GI tract. |
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Term
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Definition
alternating relaxations and contraction of smooth muscle in the GI tract
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Term
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Definition
1. break down of food into small molecules
i. 2 types:
1. mechanical- exchewing, turning of stomache and
2. chemical- ex stomach secretions. |
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Term
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Definition
| entrance of the ingested food into epithelal cells into the gi tract. |
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Term
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Definition
| removal of waste in digestable substances and bacteria in the form of feces. |
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Term
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Definition
Walls of the espohpogus to anal canal and are arranged in 4 layers. Listed deep to superficial
- mucosa
- submucosa
- muscularis
- serosa
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Term
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Definition
in lining of the gi tract which is a mucus membrane composed of its own 3 layers.
- epithelium
- llamina propria
- muscularis mucosae
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Term
| epithelium of mucosa layer of the GI tract |
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Definition
| mouth, pharynx , esophagus, and anus are all non keratinized stratified squamous epithelium. Its purpose is protection. stomach, small and large intestine simple columnar epithilium and its functions is secretion and absorbtion. |
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Term
| lamina propria of mucosa layer of the GI tract |
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Definition
| ariolar CT contains our blood vessesl and lymph vessels so that nutrients can be transferred to other cells. Also contains mucosa associated lymphatic tissue (MALT) little green things. They are lymphatic nodules. |
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Term
| muscularis mucosae of mucosa layer of the GI tract |
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Definition
| outer muscular layer thin layer of smooth muscle that creates folds to increase surface area for digestion and absorption. |
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Term
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Definition
| made of ariolar CT that contains blood and lymphatic vessels and it receives the absorbed food molecules from the mucosa. It is another passageway that carries nutrients out. |
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Term
| muscularis layer of gi tract |
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Definition
| muscle layer in the mouth pharynx, and superior and middle esophagus is made of skeletal muscle for voluntary swallowing. It is smooth muscle throughout the rest of the GI tract. The smooth muscle will involuntary contract to break food down, mix it with secretion, and propel it along the digestive tract. |
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Term
| serosa layer of the gi tract |
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Definition
1. most superficial it consist of simple squamous empithilium and ariolar CT. that helps hold the GI tract in place. |
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Term
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Definition
1. most superficial it consist of simple squamous empithilium and ariolar CT. that helps hold the GI tract in place. |
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Term
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Definition
| “brain of the gut.” It contains the neurons that innervate from the esophagus to the anus(basically the whole thing. Made up of 2 parts. Myentary plexus and submucosal plexus. Sensory neurons send signals from the gi tract to CNS by chemoreceptor and stretchreceptor reflex. |
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Term
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Definition
| located between the smooth muscle layers of the muscularis layer. Contains neurons that control gi tract motility(momvement) |
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Term
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Definition
| located in the submucosa layer and its motor neurons control secreations of our epithelial cells and organs. |
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Term
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Definition
regulates your enteric nervous system. The vagus nerve supplys parasympathetic fibers to most of the gi tract, which increase gi secretions and motility. Sympathetic fibers function to decrease secretion and motility. |
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Term
| gastrointestinal reflex pathways |
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Definition
regulates gi secretions and motitlity in response to stimuli present in the lumen of gi tract. |
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Term
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Definition
| largest membrane of the body and consist of layers of simple squamous epithelium and ariolar CT and is divided into 2 parts. |
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Term
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Definition
| lines the wall of the abdominal pelvic cavity. |
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Term
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Definition
| covers our organs within the cavity and is also the serosa layer(most outer layer) of the digestive tract. Made of ariolar CT and simple squamous epithelium. |
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Term
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Definition
space between the parietal and visceral peritoneum and contains a fluid for support and lubrication for the organs of the cavity. |
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Term
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Definition
| organs that attached to the posterior abdominal wall and are covered by peritoneum only on their anterior surface. Organs that considered: retroperitoneal: kidneys, lg intestine, duodenum, and pancreas. |
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Term
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Definition
Consist of lg folds that holds organs together and also attaches organs to the walls of the abdominal cavity. |
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Term
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Definition
| largest. Called the fatty apron because it drapes over the transverse colon and small intestine and is composed of adipose tissue. |
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Term
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Definition
| attaches liver to the anterior abdominal wall and to the diaphragm. |
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Term
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Definition
anterior fold in the serosa of the stomach and duodenum and it suspends the stomach and duodenum from the liver. Contains heptic portal vein, hepatic artery, and common vile duct. |
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Term
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Definition
| fan shaped fold that binds the jejunum and ilium to the posterior abdominal wall. |
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Term
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Definition
| binds the transverse coln and sigmoid colon to the posterior abdominal wall |
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Term
| organs that are considered retroperitoneal |
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Definition
| kidneys, lg intestine, duodenum, and pancreas. |
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