Digestive System - E3 Flashcards
another name for digestive tract
alimentary canal
what is the majority of the length of the digestive tract
gastrointestinal tract
Peritoneum
largest serous membrane
Parietal peritoneum
on wall, not associated w/organs
retroperitoneal are where only one surface is covered
Visceral peritoneum
serosa; surround organs
intraperitoneal if enclosed on both sides
“enter”
Small intestine
Functions of the digestive system
- ingestion
- propulsion
- mechanical breakdown
- chemical breakdown
- absorption
- defecation
Four basic tissue layers of the digestive tract
- mucosa - simple col. epi.
- submucosa - loose c.t.
- muscularis - arcular and longitudinal layers
- serosa (adventitia) - epi. and c.t.
Functions of the arcular and longitudinal layers
arcular - dilation
longitudinal - propulsion
Enteric nervous system
myenteric nerve plexus
submucosal nerve plexus
Another name for the oral cavity
buccal cavity
What is the purpose of lips (labia)?
suckling
Uvula
Posterior projection; closes off nasopharynx during swallowing
Tongue muscles
Intrinsic - shape
Extrinsic - movement
Dentitions
Cuspid
Dentitions are sets of teeth
Cuspid is the tooth itself
deciduous vs permanent teeth
deciduous are the primary, baby teeth, 20
permanent are the secondary, adult teeth, 32
Four types of teeth and their function
incisors - bite
canines - puncture
premolars - crush/grind
molars - crush/grind