GI System Flashcards
(155 cards)
what are the important factors of the GI in Dentistry?
- Oral cavity is gateway to the digestive tract
- GI disorders have far reaching
consequences for systemic heath - Many oral conditions linked to GI
disorders - Nutrition is a big part of what we do as
dentists - Many drugs we prescribe have
implications for the GI system
oral manifestations of GI dysfunction (3)
Crohn disease
ulcerative colitis
angular cheilitis
digestive system is essentially a ______ plant
processing plant
steps:
receives raw products
break them down
extract the parts that are needed
extrudes the rest
two general parts of digestive system
intake and processing
extraction and disposal
gut tube starts at the …
esophagus
how many layers in esophagus?
4 layers
mucosa, submucosa, muscularis, serosa/advenrtitia
gut tube layers and tissue
1) Mucosa:
Epithelium, Lamina
Propria, Muscularis Mucosa
2) Submucosa:
Dense irregular
connective tissue
3) Muscularis:
Mostly smooth
muscle
4) Serosa/Adventitia:
Connective tissue binding
everything together
identify the layers
identify the tissues associated with each layer
adventitia vs serosa
serosa: connective tissue which is covered with mesothelium
adventitia: connective tissue without the lining layer, usually attaches one organ to another
mesothelium
simple squamous epithelium
forming internal lining
retroperitoneal organs will have both adventitia and serosa and are where …
adventitia where organs are attached to one another, serosa everywhere else
label
label
salivary glands
lubrication
amylase
what happens in the oral cavity (GI System)?
chewing: breaks down food into managable pieces, starts forming food into bolus
saliva: softens and lubricates bolus
amylase begins breakdown of starches
swallowing: voluntary muscle introduce bolus into the oropharynx
peristalsis of pharynx
label
“gatekeeper” in GI system
epiglottis
three parts of the pharynx
nasopharynx
oropharynx
laryngopharynx
what are the two smooth muscle layers in digestive tract?
longitudinal (outer layer)
circular (inner layer)
peristalsis
adjacent segments of alimentary tract
organs alternately contract and relax, moving food
along the tract distally
segmentation
non adjacent segments of
alimentary tract organs alternatively contract and
relax, moving food forward, then backward. Food
mixing and slow food propulsion occurs.
pharynx is a “____ ___”
muscular tube