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Anatomy & Physiology: The Digestive System
Transcript of Anatomy & Physiology: The Digestive System
What is the function of the vermiform appendix?
Why might the appendix cause a medical issue?
If there is no digestion in the colon, why bacteria?
What happens if a person takes an antibiotic?
How can one live without a colon?
The Small Intestine
The gastrointestinal (GI) tract is a “disassembly” line
nutrients become more available to the body in each step
The alimentary canal or (GI tract) digests and absorbs nutrients
mouth, pharynx, esophagus, stomach, small intestine, and large intestine
Food does not enter the accessory digestive organs
gallbladder, salivary glands, liver, and pancreas
Six essential activities
ingestion, mechanical digestion, chemical digestion, propulsion, absorption and defecation
chewing, mixing and churning of food
catabolic breakdown of food
simple columnar epithelium
rich in goblet cells
blood and nerve supply
Histological Layers of
the Alimentary Canal
(mixing with spit)
Primary - 20 deciduous
Permanent - usually 32
Of what is saliva made?
What is the function of saliva?
What foods are digested by saliva?
Why is it near impossible to swallow a tablespoon of cinnamon at one time?
via the esophagus
opening for the
opening for the sublingual gland
What is chemically digested in the stomach?
Why doesn't the stomach digest itself?
What substances are released by gastric cells?
What is the significance of the intrinsic factor?
What hormones regulate stomach secretions and motility?
accomplishes the majority of both digestion and absorption
starts at the pyloric sphincter and ends at the ileocecal sphincter
receives digestive fluids from the pancreas, liver and gall bladder (as well as the stomach contents)
What enzymes are made by the small intestine?
of the liver
of the liver
The Biliary System
What does the pancreas make?
What does liver make?
What does the gall bladder make?
internal anal sphincter
external anal sphincter
Be sure you can:
Do not try this at home!
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