Histology Parotid gland esophagus stomach duodenum jejunum ileum colon liver pancreas Alimentary canal histological layers Models of the digestive system PhysioEx Chemical and Physical Processes of Digestion ID: 683661
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Slide1
Lab 8
DigestionSlide2
Lab 8: Digestion
Histology
Parotid gland, esophagus, stomach, duodenum, jejunum, ileum, colon, liver, pancreas
Alimentary canal histological layers
Models of the digestive system
PhysioEx: Chemical and Physical Processes of Digestion
Learn to understand and interpret data tables + simulated test tube results for salivary amylase
Learn about the major digestive enzymes and their substrates
Examine the effect of heating, cooling, and pH on enzyme activity
Use indicators of enzyme activity (IKI, Benedict
’
s, etc.) Slide3
General Structure
Digestive organs divided into 2 main groups
GI (alimentary) tract
Accessory structures
cheeks, teeth, tongue, salivary glands
liver, gallbladder, pancreasSlide4
TeethSlide5
General Organization of GI TractSlide6
Histology of the GI Tract
#55: salivary glands
#56: esophagus
#57: stomach
#58: small intestine – duodenum
#59: small intestine - jejunum
#60: small intestine – ileum
#54: liver
#39: pancreas
#61: large intestineSlide7
Salivary Glands
MA = mucous acinus; SA = serous acinus;
ducts lined by simple cuboidal epitheliumSlide8
Parotid Salivary GlandSlide9
EsophagusSlide10
EsophagusSlide11
Esophagus – 4 tissue layersSlide12
EsophagusSlide13
EsophagusSlide14
Transition Zone
Stratified squamous
Simple columnarSlide15
StomachSlide16
The interior wall of the stomach consists of a series of folds, called rugae.Slide17
Detail of RugaeSlide18
Fundus:
gastric glandsSlide19
Gastric GlandsSlide20
G Cells produce GastrinSlide21
DuodenumSlide22
DuodenumSlide23
Villi (multicellular)Slide24
DuodenumSlide25
Villi and Intestinal CryptsSlide26
DuodenumSlide27
JejunumSlide28
JejunumSlide29
Ileum with MALT =
Mucosal Associated Lymphatic TissueSlide30
IleumSlide31
Ileum with Peyer
’
s Patches = aggregated lymphatic nodulesSlide32
Ileum and Plicae Circularies
LactealSlide33
Liver in cross sectionSlide34Slide35
Liver LobulesSlide36
Liver ParenchymaSlide37
HepatocytesSlide38
Liver LobuleSlide39
PancreasSlide40
Pancreas
Exocrine: acinar cells
Endocrine: islet cellsSlide41Slide42
Pancreas
Acinar CellsSlide43
Large Intestine
(Colon)Slide44
AppendixSlide45
AppendixSlide46
ColonSlide47
ColonSlide48
Glands in ColonSlide49
Glands in Colon
colon polypSlide50
PhysioEx 39B
Experiment 1: Starch DigestionSlide51
Starch Digestion by Amylase
Starch is a polymer composed of repeating units of glucose.
Amylase breaks starch into smaller subunits such as maltose.
MaltoseSlide52Slide53
Load 7 tubesSlide54
Fill 7 tubes,
use droppersSlide55
Boil tube 1,
Incubate tubesSlide56
Transfer liquid
to new tubesSlide57
Add IKI reagent
Add Benedict
’
s reagent and incubateSlide58
Record data
Print data table and answer questions as directed in your
Lab manualSlide59
End Lab 8
Please bring a full bladder to lab next week for urinalysis!