Digestive System Flashcards




















What are the 3 processes of digestion?
- Mechanical digestion
- Chemical digestion
- Absorption
What are the 2 orgainizational parts to the digestive system?
- Alimentary Canal - mouth through anus
- Accessory organs - organs that secrete into the Alimentary canal
Name the 4 layers of the GI Tract wall:
- Mucosa
- Submucosa
- Muscularis Externa
- Serosa
Name the 3 layers within the Mucosa:
- Epithelium
- Lamina propria
- Muscularis mucosa
Name 4 things / structures that the Submucosa contains:
- blood
- nerves
- glands
- lymph nodes
Name the two smooth muscle layers in found in the Muscularis Externa:
- Circular layer
- Longitudinal Layer
Name the two serous membranes that cover and connect the organs:
- Parietal peritoneum
- Viseral peritoneum
Name the function of the Greater Omentum.
Connects the stomach to the transverse colon
Name the function of the Lesser Omentum.
Connects the small intestine to the posterior body wall
Name the function of the Transverse Mesocolon.
Connects the transverse colon to the body wall.
Name 2 function of the mouth:
- mechanical digestion
- chemical dgestion
What type of cells are found in the mouth?
Stratified Squamous epithealium
Name the type of cells found in the Pharynx and Esophagus.
Stratified squamous epithelium
Name 2 function of the stomach:
- chemical digestion of proteins
- mechanical mixing
Name 5 structures / cell types found in the stomach:
- simple columnar epithelium
- Chief cells
- Parietal cells
- Muscularis externa
- Rugae
What is the function of Chief cells?
secretion of Pepsinogen
What is the function of Parietal cells?
Secretion of HCl
What is the name of the additional layer of muscle that the muscularis externa has in the stomach?
oblique layer
Folds that allow for exspansion of the stomach are called?
Rugae
Name the 3 section of the small intestine:
- Duodenum
- jejunum
- ileum
What are the 2 function of the small intestine?
- digestion
- absorption
What Name 6 unique cell types / structures found in the small intestine:
- simple columnar epithealium
- plicae circulares
- villi
- microvilli
- Brunner’s glands
- Peyer’s patches
What is the function of Plicae circulares, villi, and microvilli in the small intestine?
They increase the absorptive surface area in the lumen.
Brunner’s glands secrete ____________.
an alkaline mucus that protects the cells in the small intestine from the acid of the stomach.
Peyer’s patches contain what that do what?
Lymphocytes for defence
Name 2 functions of the large intestine:
- absorption of water
- production of vitamin B and K
Name the structures in order starting with the entry of the small small intestine and ending with the anus.
cecum, appendix, ascending, transverse, decending, sigmoid colon, rectum, anus
What type of cells make up the epithelial surface of the large intestine?
simple columnar epithelium
What muscle that attaches to the large intestine causes it to form pockets?
tenia coli
What are the pockets in the large intestine called?
haustra
What is the dental formula for deciduous teeth?
2 incisors, 1 canine, 0 premolars, 2 molars
/
2 incisors, 1 canine, 0 premolars, 2 molars
X
2
=
20 teeth
What is the dental formula for permanent teeth?
2 incisors, 1 canine, 2 premolars, 3 molars
/
2 incisors, 1 canine, 2 premolars, 3 molars
X
2
=
32 teeth
Name the 3 salivary glands found int he mouth:
- Parotid
- Submandibular
- Sublingual
What is the function of mucus cells?
secretion of lubricent for food.
What is the function of serous cells?
Secretion of salivary amylase
What is the function of the liver?
Production of bile
Name the 3 structures located in the protal triad:
- Hipatic portal vein
- Hipatic Artery
- Bile duct
Name 3 structures found within the liver lobule:
- central vein
- sinusoids
- kupffer cells
What is the function of Kupffer cells?
contain / produces macrophages within the sinusoids.
What is the function of the Gall Bladder?
Stores bile
What is another term for the panreas
the “mixed gland”
Name 2 cell types found in the Pancreas:
- Acini
- Islets of Langerhans
Name 2 substances that Acini cells secrete:
- digestive enzymes
- bicarbonate ions
Name 2 substances that the Islets of Langerhans secrete:
- Insulin
- Glucagon