Ch. 25 Flashcards
ingestion is
eating or drinking
chewing food, occurs in gi tract
mechanical processing
breaking of chemical bonds, enzymes starts in oral cavity
chemical digestion
producing enzymes to break chemical bonds, acids in stomach
secretion
absorption happens
in large and small intestine, nutrients being absorbed
excretion occurs with
bilirubin is released from it, doesn’t do with digestion
compaction occurs
with dehydration, help with feces to be
defaction
poop
digestive protects with
flora in large intestine
deepest layer next to lumen
mucosa
mucusal epithelium is
deepest
muscularais muscoase help
contract and move plicae
order of gi tract deep to super
mucosa, submucosa, muscularis externa, serosa
submucosa contains
large blood vessels, lymphatics, and exocrine glands
peristalsis is helping
movement through the tract
segmentation helps physically
break down and mix with enzymes
persistalis and segmentation are included with
muscularis externa
most digestive organs reside within the
peritoneal cavity
visceral peritoneum is on the surfaces of
organs
parietal peritoneium lining
body wall
organs suspended in cavity by
mesentery connecting the serosae
retroperitoneal organs include
ones that develop from embryonic gut
examples of retroperitoneal
ureters
kidneys
aorta
ventral mesentary most of the time
dissappears
greater omentum is suspended between
greater omentum
mouth is the opening to
oral cavity
oral cavity lined by
oral mucusa
lips are
skeletal muscle
gums are attached by
labial frenulum
cheeks formed by
buccal fat and buccinator muscles
oral vestibule is the space between
cheeks/lips and teeth
hard palate formed by
mailla and palatine
hard palate marks
boundary for food
soft palate close off
nasopharynx for swallowing
bolus is
chewed up wad and food with enxyjmes
tongue helps
swallowing and chewing, speech
tongue sensory
taste, touch, temp
cn tongue
CN7
cn9
Cn 5
lingual lipase helps with
fat digestion
CN 12 helps control
tongue muscles
intrinsic tongue muscles change
shape of tongue
extrinsic tongue muscles extend
from skull and hyoid bones to alter tongues position
attaches tongue to floor of oral cavity by
lingual frenulum
saliva a day
1-1.5 liters
saliva not water
enzymes, ions, salivary amylase, buffers, mucins, waste
saliva functions
lubricates food
dissolves tastants
control bacterial population
salivary glands
parotid
sublingual
submandibular
largest saliva gland
parotid gland
parotid gland is drained by
parotid duct
submandibular glands are under
floor of oral cavity
what produces 70% of saliva
submandibular glands
parotid causes viral infeciton
mumps
glands below tongue
sublingual glands
chewing is called
mastication
part of tooth we see over gum
crown
crown hard substance covering
enamel
gumline is
gingivae
teeth extend below gums
root
sockets in teeth gums
alveoli
root of teeth covered by
cement
holds tooth in socket by
periodonatl ligament
bulk tooth volume formed by
dentine
teeth nerves come from
CN V
below dentine is the
pulp cavity
blood vessels and nerves from CNV via
root vanal and apical foramen
front teeth on top and bottom
incisors
incisors are for
cutting nipping
canines are for
tearing, piercing
premolars are for
crushing, grinding
molars are for
crushing
grinding
how many deciduous teeth
20 baby teeth
secondary detention is
permanent jteeth
how many permanent teeth
32 with wisdom
pharynx connects
nasal and oral cavities to larynx and esophagus
food passes from oral cavity into
oropharynx and then laryngopharynx
deglutition is
swallowing
oral cavity, pharynx, and esophagus help
deglutition
esophagus is inches long
10
stomach produces
chyme
stomach convert bolus to
chyme
pyloric is
mechanical processing
parietal cells secrete
HCL
chief cells secrete
pepsinogen
enteroendocrine cells release
hormones into interstitial fluid
mucous neck cells secrete
mucus
pepsinogen is
inactive form
needs acidic environment to be pepsin
parietal cells initiate
chief cells
