Digestive System I Flashcards
What is the main tract of the digestive system?
the gastrointestinal (GI) tract
What is another term for the gastrointestinal (GI) tract?
alimentary canal
What are all the components of the GI tract?
1) mouth
2) pharynx
3) esophagus
4) stomach
5) small intestine
6) large intestine
7) anal canal
The shape of the GI tract resembles a(n) ____.
torus
What does the shape of a torus look like?
it is donut-like
What are the accessory organs to the GI tract? Name at least 5.
- lips
- tounge
- teeth
- salivary glands
- palate
- liver
- gallbladder
- pancreas
What are the four main layers of the lips (labia)?
1) cutaneous layer (CA)
2) Red area (vermilion) (RA)
3) Oral mucosa (OM)
4) Orbicularis oris muscle (OO)
Which layer of the lips includes the following:
* hair follicles (HF)
* sebacious glands (SbG)
* sweat glands
* keratinized epidermis
cutaneous area
(cue-tay-nee-us)
Which layer of the lips includes the following:
* no hair or stratum corneum
* no glands, or only sparse
* sebaceous glands
* tall dermal papillae
red area (vermilion)
Which layer of the lips includes the following:
* nonkeratinized stratified squamous epithelium
* mucous and seromucous labial glands
oral mucosa
What does the Red area (vermilion) layer of the lips NOT have?
it has no external layer
What are the three main layers of the palate?
bone, periosteum, epithelium
Which kind of muscles does the tounge have?
intrinsic and extrinsic
Describe the components and structures located at the anterior portion of the tounge.
- muscular
- lingual papillae
- serous glands
- seromucous glands
Describe the components and structures located at the posterior portion of the tounge.
- more glandular & lymphatic
- serous glands of Von Ebner
- vallate papillae
The tounge includes ____ nerves as well as other nerves.
intermediate
The salivary glands begin as what kind of glands?
compound tubuloacinar glands
What divides the compound tubuloacinar glands into lobes?
connective tissue stroma
Which salivary gland is not encapsulated?
sublingual gland
Which two glands are encapsulated?
- parotid gland
- submandibular gland
Which protein helps digest starch in the saliva?
amylase
What is the structure called where saliva is secreted?
acini
What are the ducts called of the salivary glands?
1) acinus
2) intercalated duct
3) intralobular duct
4) interlobular duct
What are the three kinds of acini?
- serous
- mucous
- mixed
Which kind of acini have a demilune?
mixed acini
What is a demilune?
it produces serous cells that caps the acinus
What does the physical appearance of serous acini look like? What color do they stain in H&E?
dense, dark staining
H&E: reddish violet
What is the name for the secretory vesicles that serous acini are filled with?
zymogen granules
(zi-moe-gin)
Which kind of acini produces a watery, enzyme-rich secretion?
serous acini
What does the physical appearance of mucous acini look like? What color do they stain in H&E?
light, frothy
H&E: bluish violet
What kind of acini produces a viscous secretion?
mucous acini
What are the three kinds of ducts?
- intercalated
- intralobular
- interlobular
Which kind of ducts are within a lobule, not surrounded by connective tissue, and are also called “striated ducts”?
intercalated and intralobular ducts
Which kind of ducts are located between lobules (running throught the trabeculae), and are surrounded by connective tissue?
interlobular ducts
Where is the partoid gland located?
in front of the ear (anterior to the auricle of the ear)
Which kind of acini make up the paratoid gland?
serous acini