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43 Cards in this Set
- Front
- Back
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ingestion, secretion, motility, digestion, absorption, defecation
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functions of the digestive system
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enzymes, buffers, acids
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What is secreted from the digestive system
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blood and lymph
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the digestive system absorbs nutrients into the...
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mucosa, submucosa, muscularis, myenteric plexus, serosa
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layers of the GI tract
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mucosa
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innermost layer of the GI tract
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stratified squamous/simple columnar, lamina propria, muscularis mucosae
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layers of the mucosa
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stratified squamous/simple columnar
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specialized for absorption and secretion
-renewed every 5-7 days |
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lamina propria
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blood and lymph supply that absorbs nutrients
-contains MALT |
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muscularis mucosae
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thin layer of smooth muscle
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submucosa
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areolar CT, vascularized
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submucosal plexus
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network of nerves in the submucosa
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mouth, pharynx, upper esophagus, external anal sphincter
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skeletal muscle in muscularis
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inner circular, outer longitudinal
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2 layers of smooth muscle in the muscularis
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myenteric plexus
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-part of enteric nervous system
-stimulates movement of GI tract -peristalsis (parasympathetic) |
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serosa
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serous membrane
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vsiceral peritoneum
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the serosa makes up the _____
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serous fluid
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the serosa produces _____ to help lubricate
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mouth, pharynx, esophagus, stomach, small intestine, large intestine, anal canal, anus
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digestive tract
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pancreas, liver, gall bladder
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3 digestive organs that form the GI tract
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parietal
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lines abdominal cavity
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visceral
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lines organs
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peritoneal cavity
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space between, contains serous fluid
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greater omentum
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apron extending from transverse colon to small intestine and stomach
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lesser omentum
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extends between the liver and the stomach
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mesentery
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fold of peritoneum that extends from post abdominal wall to surround intestines. Anchors.
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mastication
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chewing,; mechanical breakdown of food
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salivary gland
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-keeps mouth moist
-moistens food, lubricates |
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sublingual, submandibular, parotid
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3 major salivary glands
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saliva
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mostly water
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immunoglobin A
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prevents growth of microorganisms
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salivary amylase
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digests carbs, breaks down starch into sugar
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lingual lipase
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digests lipids, breaks down TG
-activated in the stomach |
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parasympathetic
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salivation is stimulated by the _____ nervous system
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food stimulates taste buds, salivary nucleus in brain stem, salivation
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regulation of salivation
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mumps
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infection of the parotid glands
-pain in throat, fever |
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deglutition
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tongue pushes bolus posteriorly
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esophagus
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muscular tube, connects laryngopharynx to the stomach
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enters
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as upper esophageal sphincter relaxes, food _____
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allow food into stomach
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as lower esophageal sphincter relaxes while swallowing to...
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hiatal hernia
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stomach protrudes upward above esophageal hiatus of diaphragm
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gastroesophageal reflux disease
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lower esophageal sphincter does not close properly after bolus enters stomach
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H2 blockers
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tagament, pepcid AC
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proton pump inhibitors
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protonix, prevacid, nexium
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