Digestive System Topic 15 Flashcards
What are the four steps of the DS?
- Ingestion
- Digestion
- Absorption
- Defecation
4 basic layers of the GI tract
- Mucosa
- Submucosa
- Muscularis externa
- Serosa
What part of the tooth is above the gum?
Crown
Dentin is which part of the tooth?
Majority of the tooth
Which part of the tooth is acellular?
enamel
What is a root of the tooth composed of?
Dentin with cementum overlay
What attaches the root to the bone?
periodontal ligaments
What does the pulp cavity contain?
- CT
- Blood/lymph vessels
- Nerves
Which part of the digestive system is the first to have all 4 histological layers?
Esophagus
What cells secrete HCl?
Parietal cells
What cells secrete pepsinogen?
chief cells
What cells secrete mucus?
Goblet cells
What cells secrete gastrin?
G cells
What are the folds of the mucosa and submucosa are called?
Rugae
What are the 3 layers around the stomach to help digestion?
- Inner oblique
- Middle circular
- outer longitudial
What are the 3 sections in the small intestine?
- Duodenium
- Jejunum
- Ileum
Hoe does the small intestine protect from bacteria?
Peyer’s patch
What does the lacteal do?
lymph capillaries that absorb fats
What is between the villi in the SI?
Intestinal crypts
What cells secrete digestive enzymes?
Acinar cells
What cells secrete alkaline fluid?
Duct cells
What are the 4 lobes of the liver?
- Right
- Left
- Caudate
- Quadrate
How does the liver digest fat?
produces bile
What does the gallbladder do in between meals?
- Store and concerntrate the bile
- Hormones activate the release of bile for the digestion of fat
What are the parts of large intestine?
- Caecum
- Appendix
- Colon
- Rectum
- Anus
If the taeniae coli are tighten what is created?
Haustra- fermentation chambers
What are the lymph order in the digestive system?
- Lacteals
- Lymph connecting vessels
- Cisterna chyli
- Thoracic duct
- Left sublavian vein
Where is the visceral peritoneum located?
against organ wall
where is the parietal peritoneum ?
against abdomibal cavity wall
What does the peritoneal cavity filled with?
serous fluid
What part suspends the small intestine off the wall?
Mesentery