Flashcards in Digestive System Deck (128)
common hepatic duct
What is formed by union of common hepatic and cystic ducts?
What are the 3 parts of the portal triad?
Hepatic artery, hepatic portal vein, and bile duct
Carries blood from digestive organs to liver for processing
hepatic portal vein
Oxygen-rich arterial blood in the liver
Nutrient-rich venous blood in the liver
hepatic portal vein
Runs between hepatocyte platesq
What is the flow of blood in the liver?
hepatic artery and hepatic portal vein -> liver sinuoids-> central vein
Remove bacteria worn-out RBCs, and other debris from blood as flows past
Kupffer cells/ Stellate macrophages
Produce bile, process bloodbome nutrients, store fat-soluble vitamins and plays important role in detoxification
Secreted bile flows through what toward bile ducts?
Yellow-green alkaline solution
cholesterol derivatives that function to emulsify fats
chief bile pigment
Where in the pancreas do the exocrine functions occur?
How does the pancreatic juice enter the dudoenum
What are the 3 components pancreatic juice?
water, digestive enzymes, and bicarbonate ions
What causes the gallbladder to contract, stimulate secretion of enzyme-rich pancreatic juice and relaxes hepatopancreatic juice
stimulates secretion of bicarbonate-rich pancreatic rich
What digestive processes occur in the small intestine?
Mechanical breakdown and propulsion: segmentation and peristalsis
Digestion: enzymes from pancreas; brush border enzymes of microvilli
Absorption: Most water and virtually all nutrients absorbed
List what optimal digestive activity depends on:
1. bile from liver and gallbladder
2. Digestive enzymes from pancreas
3. Bicarbonate ions from the pancreas
4. Slow, measured delivery of chyme from stomach
Most common motion of small intestine, mixes chyme with bile, pancreatic juice, and intestinal juice, moves ileocecal valve
Begins late in intestinal phase
migrating motor complex
Which 2 mechanisms increase motility of ileum and cause ileocecal sphincter to relax?
Gastroileal reflex and gastrin released by stomach
Three bands of smooth muscle
Pocket-like sacs in wall of large intestine
From small intestine to the anal canal where does the food go?
cecum, ascending colon, transverse colon, descending colon, sigmoid colon
List the subdivisions of the large intestine
cecum, appendix, colon, rectum, and ana canal