COPYRIGHT CLEARANCE COVER PAGE FOR COPIES MADE BY THE NORTH-WEST UNIVERSITY (NWU) This material has been copied for educational use. It is not for resale and must not be redistributed. ----------------------------------------------------------------KOPIEREGKLARING-DEKBLAD VIR KOPIEË GEMAAK DEUR DIE NOORDWES-UNIVERSITEIT (NWU) Hierdie materiaal is vir opvoedkundige gebruik gereproduseer. Dit mag nie herverkoop of verder versprei word nie. Afdeling B: Vertering Section B: Digestion LE 1: Anatomie van die spysverteringskanaal (SVK) SU 1: Anatomy of the gastrointestinal tract (GIT) Widmaier, Raff & Strang: 14th ed = p. 527-533 15th ed = p. 532-538 eGids! | eGuide! The digestive system Eksokrien? Exocrine? Leeruitkomstes Study outcomes • Basiese prosesse vd SVK Basic processes of the GIT • Organisasie vd SVK & organe Organization of the GIT & organs • Lae vd SVK Layers of the GIT • Anatomiese aanpassings vir absorpsie Anatomical adaptations for absorption digestive system process A: 4 basiese prosesse van die SVK 4 basic processes of the GIT 14th = p. 527-528 15th = p. 532-534 Basiese funksies van die SVK Basic functions of the GIT vertering & sekresie & absorpsie & voortbeweging & eliminasie digestion & secretion & absorption & motility & elimination SVKbloed & limf GITblood & lymph HCl, gal, ensieme HCl, bile, enzymes Eliminasie Elimination los op & breek af dissolve & break down Kontraksies: meng & beweeg Contractions: mix & move 14th = fig.15-2, p.527-528 15th = fig.15-3 & tab. 15-1, p.532-534 Basiese funksies van die SVK Basic functions of the GIT 15th = tab. 15-1 B: Organisasie van die SVK & geassossieerde organe Organization of the GIT & associated organs 14th = p. 531-533 15th = p. 532-534 How your digestive system works Organisasie van die SVK & organe Organization of the GIT & organs 14th = fig.15-1 & tab.15-1 15th = fig.15-1 & tab. 15-6 Organisasie van die SVK & organe Organization of the GIT & organs 14th = fig.15-1&6 & tab.15-1 | 15th = fig.15-1&20 & tab. 15-6 Organisasie van die SVK & organe Organization of the GIT & organs 14th = tab.15-1 | 15th = tab. 15-6 Organisasie van die SVK & organe Organization of the GIT & organs 7000 mL 99% 4% 14th = fig.15-7 | 15th = fig.15-4 C: Lae van die SVK Layers of the GIT 14th = p. 528-530 15th = p. 535-537 Lae van die SVK Layers of the GIT Lae van die SVK Layers of the GIT hormones Conn. tissue Small blood v. Lymphatic v. Nerve fibers * acid bicarbonates enzymes water ions mucus Smooth muscle movement of villi * Conn. tissue neurons Contraction = lumen narrow * Smooth muscle (mix & move contents) neurons Contraction = lumen shorten * Conn. Tissue (support) 14th = fig.15-3 | 15th = fig.15-5 Lokale senuweebeheer van die SVK = Enteriese SS Local nerve control of the GIT = Enteric NS neurons neurons 14th = fig.15-3, p.528-529 | 15th = fig.15-5, p.535 D: Anatomiese aanpassings vir absorpsie Anatomical adaptations for absorption 14th = p. 529-531 15th = p. 547-548 Anatomiese aanpassings vd dundermwand vir absorpsie Anatomical adaptations of the small intestinal wall for absorption (brush border) 14th = fig.15-4, p.529 | 15th = fig.15-18, p.547 Anatomiese aanpassings vd dundermwand vir absorpsie Anatomical adaptations of the small intestinal wall for absorption 1. Gevoude mukosa, villi & mikrovilli Folded mucosa, villi & microvilli oppv.area van dunderm surface area of small intestine 600 X (250-300m2) absorbsie kapasiteit absorptive capacity (brush border) 14th = fig.15-4, p.529 | 15th = fig.15-18, p.547 Anatomiese aanpassings vir absorpsie Anatomical adaptations for absorption 2. Kontinue vervanging van epiteelselle??? Continuous replacement of epithelial cells??? ensieme enzymes 17 biljoen/dag | 17 billion/day Elke 5 dae | Every 5 days 14th = fig.15-5, p.529-530 | 15th = fig.15-19, p.535 Anatomiese aanpassings vir absorpsie Anatomical adaptations for absorption 3. Villus: Lakteaal & kapillêre netwerk Villus: Lacteal & capillary network bv. dunderm: vetabsorpsie e.g. small intestine: fat absorptioin Lumen Lakteaal Lacteal Limfstelsel Lymphatic system 14th = fig.15-4, p.530 | 15th = fig.15-18, p.548 Nou weet jy… Now you know… Basiese prosesse vd SVK Basic processes of the GIT Organisasie vd SVK & organe Organization of the GIT & organs Lae vd SVK Layers of the GIT Anatomiese aanpassings vir absorpsie Anatomical adaptations for absorption Bemeester die onderwerp… Master this topic… Fisiologie eGids vrae Physiology eGuide questions Toets jouself… Test yourself… eFundi toets (Sien schedule vir meer inligting) eFundi test (See schedule for more information)