Lecture Exam 3 Flashcards
Digestive system consist of the ______ ______ which extends from the oral cavity to the anus, and ______ _____, which aid in the digestive process
Alimentary canal
accessory organs
Name the accessory organs of the digestive system
teeth, tongue, salivary glands, liver, gallbladder, pancreas
Fused double-layer peritoneum that anchors small intestine in abdominal cavity
mesentery
Mesenteric cord that suspends liver from diaphragm and anterior abdominal wall
falciform ligament
Serous membrane that covers internal organs
visceral peritoneum
Fused double-layered peritoneum that anchors large intestine in abdominal cavity
mesocolon
Membrane that runs from liver to lesser curvature of stomach
Lesser omentum
cavity where the kidneys, abdominal aorta, pancreas, and duodenum are found
retroperitoneal cavity
serous membrane that lines walls of abdominal cavity
parietal peritoneum
membrane that runs from greater curvature of stomach to meet mesocolon
greater omentum
avity below the diaphragm; includes liver, stomach, and most organs
abdominal cavity
List the four layers of the GI tract from outermost to innermost
- (outermost) serosa
- Muscularis externa
- Submucosa
- Mucosa (innermost)
Usually contains 2 layers of smooth muscle
muscularis externa
Visceral peritoneum
serosA
the myenteric plexus is found here; ANS control of motility
muscularis externa
important in secretion, absorption of nutrients, and protection
mucosa
mostly simple columnar epithelial cells
mucosa
Dense connective tissue loaded with blood vessels, nerves, lymph vessels, and elastic fibers
submucosa
Layer that lines lumen
mucosa
contains submucosal plexus
submucosa
contains Brunner’s glands in small intestine
submucosa
contains oblique smooth muscles in the stomach
muscularis externa
Helps keep food in mouth; important in speech
tongue
manopulates food
tongue
important in mastication
teeth
closes off nasal cavity during deglutition
uvula
rough, corrugated surface, helps manipulate food
hard palate
helps keep food in mouth; forms side of oral cavity
cheeks
closes off opening to respiratory tract during deglutition
epiglottis
attaches tongue to floor of mouth
lingual frenulum
anchors lips medially to gum
labial frenulum
filled with blood vessels, nerves, and lymph vessels (regarding teeth)
pulp
Bulk of the tooth; similar to bone
dentin
cellular; hardest substance in the body
enamel
covers the crown of the tooth
enamel
formed form cells that dies after tooth is formed
enamel
vers the root
cementum
bulkiest of teeth; most posterior
molars
2 pairs, cone shaped with single root
canine (cuspid)
chisel-shaped with single root
incisors
Anterior most teeth
incisors
usually 2 cusps; bulky, 2 or 3 roots
molars/premolars (bicuspids)
teeth used for ripping and tearing
canines
eth used for grinding food
premolar and molar
teeth used for biting off pieces of food
incisors
how many diciduous teeth are there? and permanent?
20 and 32
Write the dental formula for diciduous teeth and permament teeth
2,1,0,2/2,1,0,2
2,1,2,3/2,1,2,3
Functions of saliva
- moistens mouth
- Begins starch and fat digestion
- cleanses teath
- inhibits bacterial growth
- dissolves molecules = stimulate taste buds
- moistens food and binds it together