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KIN 324K LAB LECTURE 5 - Applied Human Anatomy Lab Lab...

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Applied Human Anatomy Lab Lab Lecture V: The Digestive System & Urinary System
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General Information Lab Time: Tues. 1-4 PM, BEL 404 Fri. 1-4 PM, BEL 404 Attendance is mandatory; 3 absences will results in an F Excused absences require official reason, advanced notice Office Hours: 10-noon, M-F; BEL 966
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GI Tract (Alimentary Canal)
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Oral Cavity Tongue : bundle of skeletal muscles Manipulates food for chewing & deglutition (swallowing) Hard Palate : Thin, horizontal bony plate, formed by maxilla & palatine bones anterior roof of mouth Soft Palate : arch-shaped soft tissue Back of the roof of mouth Between oropharynx & nasopharynx Uvula : small muscular process Covered in mucosa; on soft palate near back of throat
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Oral Cavity cntd.
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Salivary Glands
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Esophagus Esophageal hiatus : pierces diaphragm through esophageal hiatus (hole) Located at level of vertebrae T10
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Swallowing
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Stomach Gastroesophageal/Cardiac sphincter : where contents of esophagus empty into stomach Fundus : formed by upper curvature of organ Body : main central region Pylorus : lower section of organ, facilitates emptying of contents into sm. intestine Pyloric sphincter : where contents of stomach empty into sm. intestine
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Stomach Functions include mechanical & chemical digestion, propulsion Contains rugae & thick, muscular, 3-layered wall to help with mechanical digestion Chemical digestion achieved with pepsin ; gastric lipase splits butterfat molecs. in milk
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Small Intestine Parts Functions include: Mechanical & chemical digestion Propulsion Absorption (90%) Duodenum : shortest part: 6-10 inches long Has Brunner’s glands; produce alkaline/HCO 3 - (basic) mucus to offset acidic chyme from stomach Jejunum : middle section; approx. 6 ft long Ileum : joins lg. intestine at ileocecal valve (ICV) Approx. 9 ft long
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Small Intestine Microanatomy Covered in plicae circulara (folds to increase SA for absorption of nutrients) Villi project from plicae ciculara, which are covered with microvilli Villus contains a lacteal (modified lymphatic capillaries that absorb foodstuffs into lymphatic system) & capillaries Epithelial cells migrate up villi and differentiate into different cell types
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  • Summer '08
  • FARRA
  • chemical digestion, glomerular capillaries, glomerular capsule, glomerular blood pressure, Small Intestine Microanatomy

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