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The tubelike digestive system canal that extends from the mouth to the anus is known as the
Alimentary canal or gastrointestinal tract
How is the muscularis externa of the stomach modified?
Besides the usual circular and longitudinal layers of smooth muscle, it also an innermost layer of smooth muscle that runs obliquely.
How does the modification relate to the function of the stomach?
Allows stomach not only to mix, churn and move food along the tract (circular/longitudinal fiber function) but also to pummel the food, physically breaking it down into smaller fragements and to ram food into the small intenstine (oblique fiber function)
What transition in epithelial exist at the gastroesophageal junction?
Squamous cells in the esophagus to columnar cell in the gastric mucosa.
How do the epithelia of these two organs relate to their specific function?
Simple columnar for gastric is absorption & stratified squamous provides protection in esophagus
Differentiate between the colon and the large intestine
Large intestine extends from the ileocecal valve to the anus. Colon is part of the large intestine and is divided into ascending, descending, and sigmoid colon.
Deep folds of the mucosa and submucosa that extend completely or partially around the circumference of the small intestine
3 structures continous with and representing modifications of the peritoneum
Greater omentum, lesser omentum, and mesentary
Location of the hepatopancreatic sphincter through which pancreatic secretions and bile pass
What's the dental formula for permanent teeth? Explain what it means.
2,1,2,3 / 2,1,2,3 x 2 = 32 ; It means 2 incisors, 1 canine, 2 premolars, and 3 molars on the upper teeth & 2 incisors, 1 canine, 2 premolars, and 3 molars on the lower teeth MULTIPLY by 2.
Produces a whole spectrum of enzymes and an alkaline fluid that is secreted in the duodenum
Name 3 structures always found in the portal regions of the liver
Hepatic artery, hepatic portal vein, and bile duct
Where would you find the Kupffer cells of the liver? What's its function?
Sinusoid walls; remove debris such as bacteria or won-out blood cells from the blood.
Why is the liver so dark red in the living animal?
High amount of blood that circulates through the liver
What are the two major populations of secretory cells in the pancreas? Which serves the digestive process?
Islets and acinar cells; acinar cells
Compare the appearance of tongue papullae in cats and humans.
Filiform papillae, especially at the anterior end of the tongue, is sharp, bristly and more abundant in the cat.
What's the adult dental formula in cats?
3 incicors, 1 canine, 3 premolars, 1 molar (Upper teeth) / 3 incisors, 1 canine, 2 premolars, 1 molar (Lower teeth) X2 = 30 teeth total
How do the villi differ in the duodenum and the ileum?
The vilia are large and leaflike in the duodenum since it's the intestinal site of most active absorption. In the ilem, the villi gradually narrow and shorten along the length of the small intestine.
I am part of the GI tract. When undigested food is rushed through me, I cannot properly absorb water, resulting in diarrhea. Name this organ.
Name 2 structures that increase the absorptive surface area within the digestive tract
Villi and microvilli
What causes the yellowing of tissues in jaundice?
Too much bile produced in the liver; block duct causes bile to spill into tissues.
What is the function of the bicarbonate ions in the pancreas?
Neutralize acidity of chyme entering small intestines
Name the special phagocytic cells that line the liver sinusoids, and work to remove debris from blood as it flows past.
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